FreeVirtual Symposium Celebrating 100 Years of Polymer Science 2020年,距Hermann Staudinger发表那篇具有划时代意义的论文“über Polymerisation”,已经过去了100周年。现如今,我们回顾着高分子科学群星璀璨的过去,提出了一个问题: 高分子科学的未来在哪里? WILEY高分子期刊编辑团队怀着对该科研领域的敬意与自豪感,举办本次在线研讨会,聚焦高分子科学最新科研成果,共同探讨以下议题: Theory and simulation of soft materials Design of 2D/3D/4D materials via synthetic chemistry Conjugated polymers for biomedical applications 会议时间 2020年10月15日(周四)晚20:00 免费注册 扫描下方二维码或点击链接 https://app6sjglueg4184.h5.xiaoeknow.com/v1/course/alive/l_5f8040bde4b0e95a89c2fc57?type=2 主讲嘉宾 ArthiJayaraman University of Delaware, USA Bin Liu National University of Singapore , Singapore CyrilleBoyer University of New South Wales, Australia 我们期待与你在Polymer 100在线研讨会相见!
高分子科学杂志创新奖 The Journal of Polymer Science Innovation Award 从2012 年起开始设立, 表彰40 岁以下的有杰出研究创新和成果的高分子科学家 。 Journal of Polymer Science 在此郑重 征集第五届的国际奖项的提名 。 该奖项包括 参加ACS主办的与 Polymeric Materials: Science andEngineering (PMSE) 有关的研讨会, ACS Fall meeting 晚宴上出席表彰,5000 美元的奖金,以及 颁奖年 ACS Fall meeting 的1000 美金路费。 该奖项提名需要 提交一页纸的文件,陈述为什么被提名人的研究创新性值得表彰,以及被提名人的最新简历一份。 请将提名于 2016 年1 月19 日前发送至 jpschem@wiley.com 或 jpsphys@wiley.com 过去的四个奖项颁给了探索聚合物体系物理和化学新领域的年轻科学家。以前的获奖者包括德克萨斯大学奥斯汀分校教授, Christopher Bielawski ,马萨诸塞大学阿姆赫斯特分校高分子科学与工程系副教授 Ryan Hayward ,佛罗里达大学的化学系副教授 Brent Sumerlin ,以及加州大学圣芭芭拉分校的化学工程和材料学教授 Rachel Segalman 。 2016 年提名正式开始了!~ Associated Title(s): Journal of Polymer Science Part A: Polymer Chemistry Journal of Polymer Science Part B: Polymer Physics 原文: The Journal of Polymer Science Innovation Award wasestablished in 2012 to celebrate significant research innovation andachievement in a polymer scientist under 40. The Journal of Polymer Science is again proud to announce the call fornominations for the fifth year of its international award. The award consists of a symposium in association with the PolymericMaterials: Science and Engineering (PMSE) Division of the ACS anda dinner in recognition of the recipient at the ACS Fall meeting , a $5,000 prize, and travel expenses of up to$1,000 to the ACS fall meeting for the award year. Nominations for the prize should consist of a one-page documentfrom the nominator in support of the nominee explaining why the innovativenature of their research deserves recognition and an up-to-date CV from thenominee. Please send nominations to jpschem@wiley.com or jpsphys@wiley.com before January 19th, 2016. The past four awards were given to young scientists exploringexciting new fields in the chemistry and physics of polymer systems. Previousaward winners include Christopher Bielawski, Professor of Chemistry at theUniversity of Texas at Austin; Ryan Hayward, an Associate Professor of PolymerScience and Engineering at the University of Massachusetts, Amherst; BrentSumerlin, then an Associate Professor of Chemistry at the University ofFlorida; and Rachel Segalman, Professor in both Chemical Engineering andMaterials at the University of California, Santa Barbara. Let the 2016 nominations begin!
从2013年10月起,Wiley China Blog将定期筛选Wiley Online Library上各学科前一个月中国地区访问量排名前10的文章与大家分享,暂定每周分享1-2个学科,欢迎大家关注。由于学科众多,难以短时间内全部一一发布,所以如果您有特别感兴趣的学科,欢迎告知我们,可以提前安排哦~ 以下是 2013年9月中国地区 访问量最高的 10 篇 高分子科技类(Polymer Science Technology) 文章 : Development of a Sperm-Flagella Driven Micro-Bio-Robot Advanced Materials Progressive Macromolecular Self-Assembly: From Biomimetic Chemistry to Bio-Inspired Materials Advanced Materials Formation of a Metal–Organic Framework with High Surface Area and Gas Uptake by Breaking Edges Off Truncated Cuboctahedral Cages Angewandte Chemie International Edition Bacterial-Cellulose-Derived Carbon Nanofiber@MnO2 and Nitrogen-Doped Carbon Nanofiber Electrode Materials: An Asymmetric Supercapacitor with High Energy and Power Density Advanced Materials Graphene-Wrapped MnO2–Graphene Nanoribbons as Anode Materials for High-Performance Lithium Ion Batteries Advanced Materials Space-Confinement-Induced Synthesis of Pyridinic- and Pyrrolic-Nitrogen-Doped Graphene for the Catalysis of Oxygen Reduction Angewandte Chemie International Edition A Flexible and Highly Pressure-Sensitive Graphene–Polyurethane Sponge Based on Fractured Microstructure Design Advanced Materials Multifunctional Up-Converting Nanocomposites with Smart Polymer Brushes Gated Mesopores for Cell Imaging and Thermo/pH Dual-Responsive Drug Controlled Release Advanced Functional Materials Graphite Intercalation Compounds (GICs): A New Type of Promising Anode Material for Lithium-Ion Batteries Advanced Energy Materials Chiral Scandium(III)-Catalyzed Enantioselective α-Arylation of N-Unprotected 3-Substituted Oxindoles with Diaryliodonium Salts Angewandte Chemie International Edition
晚上收到Macromolecules杂志2012年Most Read Aritcles(我译为最受欢迎文章)的邮件。一共有10篇文章,其中有几篇文章一直出现在以往收到的最受欢迎文章列表中。相应的文章题目依次为: Atom Transfer Radical Polymerization (ATRP): Current Status and Future Perspectives Graphene/Polymer Nanocomposites Rational Design of High Performance Conjugated Polymers for Organic Solar Cells Light-Responsive Block Copolymer Micelles Multicompartment Block Polymer Micelles RAFT Agent Design and Synthesis Shaped Hairy Polymer Nanoobjects Polymer Nanocomposites Containing Carbon Nanotubes Triggered Release from Polymer Capsules Theory of Block Polymer Micelles: Recent Advances and Current Challenges 大致可以分为四类: 第一类为活性自由基聚合(1和6),老马综述了ATRP的最新进展,而另外一个是RAFT聚合的CTA的合成,与ATRP并驾齐驱;第二类为有机/无机复合材料(2和8),对应的无机材料则为现在热得烫手的石墨烯和碳纳米管;第三类为嵌段类聚合物(4,5,9,10),其中4,5,10为嵌段共聚物胶束,涉及光敏,多组分设计和理论。而9则为聚合物胶囊,应该归为嵌段共聚物自组装行为的应用。剩下的2个可以归为第四类(3和7),3为共轭聚合物的有机太阳能电池应用,也是烫手的研究热点之一,而7则可以归为聚合物刷领域,该类结构主要与生物领域进行结合,探索可能的应用前景。 不管这些研究热点是否最后能够有好的应用,至少大家都在关注,或者在跟进相关的领域,唯恐被打入该领域的“ 冷宫 ”。如果把这些热点再总结一下的话,是不是:对聚合物结构进行严格的控制合成(第一类),在研究其特殊构象行为的基础上(第三类和7),单独或与其它材料一起(第二类),探索其可能的应用前景(如3)。不知道在这些所谓热门领域背后,我们自己还能有多少创新的余地呢?
七月底投得那篇论文最终没有被接受,着实郁闷了一阵子。不过,评阅人的建议也很正确,论文的视角局限于高分子合成,虽然这一部分很好,但是对于我投稿的那个面向整个化学领域的高水平期刊来说还是不够的。没得说,按照评阅人的建议拓宽应用范围再试了(耗时近三个月,最近终于有些眉目了)。 九月份,另外一位学生的工作也有了比较完整的结果。抓紧时间整理,有了前一篇的经验,这篇论文整理起来要顺利很多。昏天暗地将近半个月,终于定稿了。投稿的那天正好是国庆节,看大阅兵时还在想着稿件,阅兵结束后,我这里也最后一次检查完毕,投稿了。 11月2日,星期一,收到了编辑的回信。accepted with minor revision,呵呵,也就是格式方面需要小改一下,终于,踏入高分子化学领域三年来,第一篇论文出来了。对了,期刊是ACS的Macromolecules,高分子领域里的顶级,呵呵。 灌一小篇水,庆祝一下,hoho。 写于2009年11月8日
注:物理学上relaxation time中文叫“弛豫时间”。“松弛时间”是高分子学科的译法。感谢其他老师的指教! 不知道是不是我所在的学院主要是一个化学背景的学院,所以我遇到很多同学——一度也包括我自己——对什么是“松弛时间”是很困惑的。学生可能一律是在上《高分子物理》课的时候接触到这个概念的。但是,高分子物理,是讲粘弹性力学模型的时候突然用这个词的,大致上就是有个粘壶,有个弹簧,列个方程,里面含有粘度与模量的比值,书上就直接说这个比值“叫做松弛时间”,令人无语。粘度是粘度,模量是模量,怎么会出来时间?不是要发生一件事情,有开始,有结束,才能测量出时间来的吗?这个时间既然叫做“松弛”,那就是发生了“松弛”这件事。所以问题应该是“松弛”是一件什么事情?主语是谁?过程是怎样的?结果是什么?这些,不光在《高分子物理》课本上没有说清楚,在很多流变学的书里面也没说清楚。 然后学生进入实验室之后,特别是我们组,例如遇到动态光散射实验,发现又有“松弛时间”。动态光散射没有粘度,没有模量,怎么又叫“松弛时间”?整天这个“松弛时间”那个“松弛时间”动不动就“松弛时间”,不同场合所出现的“松弛时间”是不是一个意思?同一个材料,做动态光散射的那个“松弛时间”,跟做应力松弛的那个“松弛时间”相不相等?这些问题都没法从“粘度除以模量”的已有知识进行回答,就会令人觉得所有“松弛时间”都是属于另一个世界的东西。“松弛时间”这一概念似乎是阻碍我们院的研究生从“反应、过柱、挤出、打红外打核磁做DSC做拉力”的“民工式”材料学研究进入到真正的物理化学研究的最大门槛。为了搞懂一个词,叫人回家通读《平衡态统计物理》,似乎有点过份。但是,一个仅知道“松弛时间等于粘度除以模量”的学生,叫他怎么去理解在不同场合下出现的“松弛时间”?更别说自主地正确使用这一物理量了。 我看到俄罗斯流变学家Alxander Malkin的流变学教材Rheology: Concepts, Methods and Applications在第2章介绍粘弹性的时候,专门用一块小字号的阅读材料来解释什么叫松弛时间——而且是作为物理学的一般性概念来介绍。很简短明快,值得借鉴。 Relaxation time — gen-eral con-cept in physics The con-cept of relax-ation has a gen-eral mean-ing for many phys-i-cal phe-nom-ena. It is a reflec-tion of an idea of restora-tion of equi-lib-rium state from a non-equilibrium con-di-tion, regard-less of the rea-sons which caused the depar-ture from equi-lib-rium. For exam-ple, this can be con-cen-tra-tion fluc-tu-a-tion caused by purely sta-tis-ti-cal rea-sons as was con-sid-ered by Maxwell. Let the equi-lib-rium value of some phys-i-cal para-me-ter be X ∞ , cur-rent value of this para-me-ter be X, and let it be sup-posed that the rate of approach of equi-lib-rium is pro-por-tional to the dis-tance from the equi-lib-rium. This assump-tion imme-di-ately leads to the fol-low-ing first-order kinetic equa-tion: where k is a kinetic rate con-stant with the dimen-sion of rec-i-p-ro-cal time. The para-me-ter X in the ini-tial state equals to X0. Then, the solu-tion of this equa-tion is Now, if X ∞ =0, then the sim-plest form of this equa-tion is (*) The last two equa-tions describe the relax-ation process, and the value of is called therelax-ation time. Its value char-ac-ter-izes the rate of approch of the equi-lib-rium (but not the com-plete time nec-es-sary to reach this equi-lib-rium because it is infi-nitely large accord-ing to equation *. 以上这段话不仅从正面简短介绍了“松弛时间”的概念,还适时解答了一般人很容易产生的困惑,包括本文开头提出的那几个疑问。在一个教材里面,加上这么一小段话,并不影响教材的篇幅或者印刷,但是却对学生今后的发展作用重大。由于这一介绍松弛时间一般性的定义,因此它不会像“粘度除以模量”那样无法延伸到其他场合。所有场合下出现的“松弛时间”,都可以拿以上那段话的内容去理解。这才是学习应该达到的效果。 Alexander Yakovlevich Malkin 是俄罗斯的流变学家。很老了,可惜关于他的故事了解得不多。也许郑融老师会对他有所了解? Read more: http://www.andrewsun.net/panta_rhei/archives/4768#ixzz1yXx3sE2B
http://d.wanfangdata.com.cn/periodical_sdswyxgc200204017.aspx 含糖聚合物在生物医药领域的应用 孟建文 谭业邦 王成威 (山东大学化学与化工学院,济南 含糖的聚合物是指糖组分通过不同的化学反应途径引入到聚合物分子链中而形成的功能高分子材料。糖基的亲 水性、生物相容性和生物降解性,使含糖的聚合物在生物、医药等方面具有广泛的用途。如利用糖的组 分在细胞间识别的特性,可以用来模拟生物聚合物材料、手性识别等。含糖的聚合物水凝胶可以应用 于生物医药、膜分离及细胞生长介质。本文主要介绍含糖高分子材料的合成及其在高分子药物、高分 子缓释材料、生物材料分离提纯中的应用。是指糖组分通过不同的化学反应途径引入到聚 合物分子链中而形成的功能高分子材料。糖基的亲水性、生物相容性和生物降解性,使含糖的聚合物在 生物、医药等方面具有广泛的用途。如利用糖的组分在细胞间识别的特性,可以用来模拟生物聚合物 材料、手性识别等。含糖的聚合物水凝胶可以应用于生物医药、膜分离及细胞生长介质。本文主要介 绍含糖高分子材料的合成及其在高分子药物、高分子缓释材料、生物材料分离提纯中的应用。 ================== http://www.dur.ac.uk/n.r.cameron/Glycopolymers.htm Glycopolymers Polymers with saccharide groups pendant to the main chain are known as glycopolymers. Due to the specificity of interaction between sugars and cell surface receptor proteins (lectins), glycopolymers are potentially useful materials for applications such as targeted drug delivery, biosensors and protein purification. Glycopolymers can be synthesised either from monomeric glycosides or by functionalisation of a suitably reactive precursor polymer. In our group we favour the former route as it gives more well-defined materials. We have prepared a range of sugar-bearing monomers, including acrylates, methacrylates and methacrylamides. These can be converted to polymers by radical polymerisation, via two conceptually different routes starting from protected sugar equivalents. The protected monomers can be polymerised, then the protecting groups removed; alternatively, the monomers can be deprotected then polymerised. We have found in all cases that the latter route leads to much better defined materials, as evidenced by NMR spectroscopy and elemental analysis. Surprisingly it has been found that homoglycopolymers often display aggregation behaviour in aqueous solution, forming particles in the size range 50-500 nm. We believe that these are loose aggregates rather than true micelles, due to the lack of an ability to solubilise pyrene. Again, only materials prepared from deprotected monomers give well-defined aggregation behaviour. The interaction of a homopolymer of a beta- D -galactose bearing monomer with the lectin Arachis Hypogaea (Peanut Agglutinin, PNA) was studied by isothermal microcalorimetry (ITC) in collaboration with Dr Snjezana Stolnik of the School of Pharmacy at the University of Nottingham. It was found that the glycopolymer had a binding constant around 50 times greater than the free sugar and 10 times greater than the parent monomer. In addition, the binding was found to be entropic in nature, suggesting that the release of surface bound water from the protein is the driving force for binding. In a related project, we have been developing glycopolymers as vehicles for the delivery of metabolites to mammalian spermatozoa. Water-soluble polymers bearing beta- D -galactose side groups and species such as alpha-tocopherol (vitamin E) have been prepared and incubated with boar spermatozoa for periods up to 10 days. It has been found that the level of vitamin E within the cells increases up to 20 times that found in the control sample. The treated cells also have a much greater resistance to oxidative damage, as evidenced by a much reduced intracellular concentration of malondialdehyde (a marker of lipid peroxidation) following TBARS assay. It has also been found that the viability of treated cells is maintained for longer than untreated cells. This is one of only a handful of successful glycopolymeric delivery systems for bioactive molecules.
高分子聚合物的动力学 侯吉旋 Introduction What is the soft condensed matter? F = U - TS 体系的自由能分为两部分, U 和 S 。 U 起主要贡献的体系,就是传统意义上的硬物质,而熵起主导作用的体系就是我们所说的软物质。 从自由能公式里就可以看得出,软物质对于温度 T 非常敏感。 对于钢铁做的弹簧,要拉开一定距离需要一定的力 F ,当我们把弹簧放在火上烤一烤,要拉开同样距离的话, F 几乎不怎么变化。但是如果把弹簧换成橡胶,那就完全不一样了,因为橡胶属于软物质。 高分子聚合物能带来什么有趣的事? Non-Newtonian fluids elastic recoil 怎样研究高分子聚合物? 物理学家研究一个体系,无非就是给体系一个变化,看体系的反应。 例如压一压物体,看物体形变了多少;在物体两端加个电压,看物体内部产生多大电流;给物体加热一些,看看物体需要吸收多大的能量,等等。 研究高分子熔体也是一样,加上一个瞬间剪切,看切应力是如何变化的。 stress relaxation modulus G ( t ) G ( t ) can also be determined by applying a constant strain, g s and observing stress relaxation over time: G ( t )= s (t)/ g s 研究高分子聚合物难在哪里? 由于链与链之间不能相互穿透,这就行成了一种拓扑约束。数学上,对拓扑约束的描述是非常复杂的。 Reptation Theory 所幸的是,大约四十年前,Reptation理论诞生了,这个理论也促使法国科学家de Gennes获得了诺贝尔物理学奖。 Rouse Model-- 单链 Reptation-- 多链 然而Rouse理论和Reptation理论并不能完全解释高分子熔体中所有现象。当高分子链很短的时候可以用Rouse理论来解释,当高分子链及其长的时候可以用Reptation理论来解释。 然而处于中间的一大部分的区域无法得到很好的解释。 这个时候我们不能仅仅考虑Reptation这一个机理,还需要考虑另外两个很很重要的机理长度涨落(CLF)和限制脱落(CR)。 为了检验现有的一些管子理论,我们做了大量的计算机模拟。 我们发现现有的管子理论都不能给出完全符合计算机模拟数据的结果 。 n We present an extensive set of simulation results for the stress relaxation in bead-spring polymer melts. n We have performed parameter-free tests of several different tube models. Whats wrong with our theories???? 当所有的管子理论都不能给出完美的结果的时候,我们开始对其中的某一理论进行修正。 A possible explanation is a double-counting of the effect of short- wavelength (p Z) modes in Likhtman and McLeishs theory. we have removed from the CLF part of (t) the contribution of modes with a relaxation time shorter than entanglement time. n 注: 本博文中部分图片来自网络。 We repaired LM theory so that it shows excellent agreement with simulation data!
200001 Preparation and characteristics of nonflammable polyimide materials Preparation and characteristics of nonflammable po ,Journal of Applied Polymer Science, 75, 384-389, 2000
上网检索了一下,发现截止2010年2月2日,中科院工程塑料重点实验室自1991年成立以来发表的论文中,引用超过100次的有如下8篇: 标题 作者(通讯作者) 发表刊物 年、卷、页 总引用次数 年均引用次数 1 Studies on nylon 6 clay nanocomposites by melt-intercalation process Liu LM, Qi ZN, Zhu XG (漆宗能) JOURNAL OF APPLIED POLYMER SCIENCE (2009年IF: 1.187) 1999, 71(7): 1133-1138 456 38.00 2 PP/clay nanocomposites prepared by grafting-melt intercalation Liu XH, Wu QJ (刘晓辉) POLYMER (3.331) 2001, 42(25): 10013-10019 225 22.50 3 Homogeneous acetylation of cellulose in a new ionic liquid Wu J, Zhang J, Zhang H, et al. (张军) BIOMACROMOLECULES (4.146) 2004, 5(2): 266-268 125 17.86 4 1-Allyl-3-methylimidazolium chloride room temperature ionic liquid: A new and powerful nonderivatizing solvent for cellulose Zhang H, Wu J, Zhang J, et al. (张军) MACROMOLECULES (4.407) 2005, 38(20): 8272-8277 122 20.33 5 Preparation and properties of hybrids of organo-soluble polyimide and montmorillonite with various chemical surface modification methods Yang Y, Zhu ZK, Yin J, et al. (合作论文) POLYMER (3.331) 1999, 40(15): 4407-4414 115 9.58 6 Polyamide 6 silica nanocomposites prepared by in situ polymerization Yang F, Ou YC, Yu ZZ (欧玉春) JOURNAL OF APPLIED POLYMER SCIENCE (1.187) 1998, 69(2): 355-361 112 8.62 7 Synthesis and characterization of PAn/clay nanocomposite with extended chain conformation of polyaniline Wu Q, Xue Z, Qi Z, et al. (漆宗能) POLYMER (3.331) 2000, 41(6): 2029-2032 112 8.62 8 A new process of fabricating electrically conducting nylon 6/graphite nanocomposites via intercalation polymerization Pan YX, Yu ZZ, Ou YC, et al. (欧玉春) JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS (1.586) 2000, 38(12): 1626-2633 104 9.45 9 Synthesis and properties of silicone rubber organomontmorillonite hybrid nanocomposites Wang SJ, Long CF, Wang XY, et al. (漆宗能) JOURNAL OF APPLIED POLYMER SCIENCE (1.187) 1998, 69(8): 1557-1561 98 7.54 其中有一篇为合作论文且通讯作者非工程塑料实验室人员,其他均为实验室独立完成。No.9的引用接近100次。原以为这样的数字不高,但通过和隔壁的两个常发牛文的国家重点和院重点实验室比较,发现篇数和最高引用数只多不少(data not shown)。再考虑到期刊的IF(2009年)最高的只有区区的4.407,这样的成绩应该不算寒碜。 另外还有3篇年均引用(算上2010年)超过10次的文章,也值的一提: 标题 作者(通讯作者) 发表刊物 年、卷、页 总引用次数 年均引用次数 10 Low percolation thresholds of electrical conductivity and rheology in poly(ethylene terephthalate) through the networks of multi-walled carbon nanotubes Hu GJ, Zhao CG, Zhang SM, et al. (阳明书, 王志刚) POLYMER (3.331) 2006, 47(1): 480-488 87 17.40 11 Vinyl polymerization of norbornene with neutral salicylaldiminato nickel(II) complexes Sun WH, Yang HJ, Li ZL, et al. (孙文华) ORGANOMETALLICS (3.815) 2003, 22(18): 3678-3683 84 10.50 12 Synthesis and characterization of multi-walled carbon nanotubes reinforced polyamide 6 via in situ polymerization Zhao CG, Hu GJ, Justice R, et al. (阳明书) POLYMER (3.331) 2005, 46(14): 5125-5132 64 10.67 No.9为工程塑料实验室两个课题组共同完成,No.10和11为合作论文,但工程塑料实验室研究人员为通讯作者。 (2010-02-05注:为了避免误会,做了一些修改。将我们实验室改为中科院工程塑料实验室。原文所述实验室与有些同行理解的课题组不同,是一个由多个课题组组成的共同体。我是其中的一位研究人员,上述各篇论文均与我无关。)
2010年,英国皇家化学会将出版一份新期刊Polymer Chemistry,主编是University of Warwickd David Haddleton。网址为: http://www.rsc.org/Publishing/Journals/py/Index.asp 。 Polymer Chemistry现已有6篇文章上网,包括三篇综述: A facile route for the preparation of azide-terminated polymers. Clicking polyelectrolyte brushes on planar surfaces and nanochannels Basit Yameen, Mubarak Ali, Marta lvarez, Reinhard Neumann, Wolfgang Ensinger, Wolfgang Knoll and Omar Azzaroni, Polym. Chem., 2010 DOI: 10.1039/b9py00201d Enhanced HTML article available Micelles with surface conjugated RGD peptide and crosslinked polyurea core via RAFT polymerization Hien T. T. Duong, T. L. Uyen Nguyen and Martina H. Stenzel, Polym. Chem., 2010 DOI: 10.1039/b9py00210c Enhanced HTML article available Exponential growth of functional poly(glutamic acid) dendrimers with variable stereochemistry Sebastian Hartwig, Mary M. Nguyen and Stefan Hecht, Polym. Chem., 2010 DOI: 10.1039/b9py00217k Enhanced HTML article available Thiol-ene click reactions and recent applications in polymer and materials synthesis Andrew B. Lowe, Polym. Chem., 2010 DOI: 10.1039/b9py00216b Enhanced HTML article available Polycarbazoles for plastic electronics Pierre-Luc T. Boudreault, Serge Beaupr and Mario Leclerc, Polym. Chem., 2010 DOI: 10.1039/b9py00236g Enhanced HTML article available Photo-responsive systems and biomaterials: photochromic polymers, light-triggered self-assembly, surface modification, fluorescence modulation and beyond Francesca Ercole, Thomas P. Davis and Richard A. Evans, Polym. Chem., 2010 DOI: 10.1039/b9py00300b Enhanced HTML article available
今天读了一篇文献,作者立意不错,结果也很好,写作手法更是不错,科学网上某人还写博客推荐过,但是读到其中的一段,感觉非常的不舒服,如鲠在喉,不吐不快。 这篇文章,用polymer stablize nanoparticle in solution 因为目的是做催化,所以要除掉polymer 作者说从实用角度出发,应该尽可能的少用polymer 这没错 但是你猜作者接下来说啥了? 作者说,我们发现,用Mw=360k的polymer代替Mw=40k的polymer,那么所需polymer浓度可以降低10倍,有效的减少了polymer的用量 然后俺擦了擦眼睛,仔细得看了好几遍,又用作者给的加料量自己计算了好几遍(因为伊没有明说他降低了10倍的那个浓度到底是啥浓度),伊讨论的浓度,果然是摩尔浓度! 你丫把分子量提高了9倍,又把摩尔浓度降低了10倍,你自己算算你的polymer用量到底少了多少??!! 附:文章链接: http://www.pnas.org/content/105/40/15241.abstract Synthesis of heterogeneous catalysts with well shaped platinum particles to control reaction selectivity Ilkeun Lee , Ricardo Morales , Manuel A. Albiter , and Francisco Zaera *