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The Chemistry of Mercaptosilanes
关键字：Mercaptosilanes Rubber
The aim of this study is to elucidate the reaction mechanism of mercaptosilanes. Model compound vulcanizationusing NMR-techniques, in-rubber investigations andresults of tire tests were used to derive a postulated catalysis cycle. The propo...
http://www.polymer.cn/research/dis_info9212 |
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The Chemistry of Mercaptosilanes
关键字：Mercaptosilanes Rubber
The aim of this study is to elucidate the reaction mechanism of mercaptosilanes. Model compound vulcanizationusing NMR-techniques, in-rubber investigations andresults of tire tests were used to derive a postulated catalysis cycle. The propo...
http://www.polymer.cn/research/dis_info9212 |
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Journal of Materials Chemistry 2011, 21, 6677-6682.
A series of water-soluble and cationic methoxy poly(ethylene glycol)-b-poly(g-amino-3-caprolactone) (mPEG-b-PACL) has been synthesized via ring opening polymerization of g-(carbamic acid benzyl ester)-3-caprolactone (gCAB3CL) using mPEG as a macroinitiator and Sn(Oct)2 as a catalyst, and subsequent hydrolysis of the Cbz protecting groups under acidic conditions. The well-defined structure
of copo...
http://www.polymer.cn//ss/langmeidong/publicationsshow_2995.html |
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Chinese Journal of Chemistry 2011, 29(2), 343-350.
In this paper, aliphatic polyesters functionalized with pendant carboxylic groups were synthesized via several steps. Firstly, substituted cyclic ketone, 2-(benzyloxycarbonyl methyl)cyclopentanone (BCP) was prepared through the reaction of enamine with benzyl-2-bromoacetate, and subsequently converted into the relevant functionalized δ-valerolactone derivative, 5-(benzyloxy carbonylmethyl)-&...
http://www.polymer.cn//ss/langmeidong/publicationsshow_2992.html |
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Journal of Material Chemistry 2009, 19, 2778–2783
A facile hard-templating route has been successfully developed to fabricate uniform hollow mesoporous silica spheres and ellipsoids by using hematite as hard template. The outer diameter of the spherical mesoporous silica particles can be well adjusted in a sub-micrometric range (typically around 100–200nm) by selecting suitable hematite particles as core templates. The thickness of the meso...
http://www.polymer.cn//ss/langmeidong/publicationsshow_1631.html |
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Science in China Series B Chemistry 2008, 51(11), 1044-1050
The electron-withdrawing groups (EWGs) in the electrophilic alkenes employed in the Michael addition reaction are almost only CO2R, CN, COR, NO2, and SO2Ph. Although amides (CONR1R2) are also typical electron-withdrawing groups and are of great importance in organic synthesis, they are scarcely employed as the EWGs of the electrophilic alkenes in the Michael addition reaction. In this work, the Mi...
http://www.polymer.cn//ss/langmeidong/publicationsshow_1627.html |
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Chemistry Research of Chinese University 1997, 13(1), 77-82
Poly(ethylene oxide) containing azo groups (pre-PEO) was prepared by reacting azoisobutyronitrile (AIBN) with poly(ethylene oxide) (PEG). The molecular weight of pre-PEO was depended on the reaction time, the ration of PEG to AIBN and the molecular weight of PEG. Pre-PEO decomposed in the presence of butylacrylate (BA) monomer to from poly(ethylene oxide-block-butylacrylate) copolymers (PEO-b-PBA)...
http://www.polymer.cn//ss/langmeidong/publicationsshow_1598.html |
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Nature文章：怎样的学术导师是好导师？
关键字：导师
“在任何学科领域，是否有一个好导师将决定学生的研究生涯初期的成败。” [1]
什么样的导师是好导师呢？2005年，Nature创立了the Nature awards for mentoring in science，用于表彰在指导研究生方面卓有成效的导师。有关人员广泛收集总结了学生们对其导师的评价，总结成了给导师的16条建议 [2]，如对学生的智力与能力的尊重，对学生职业发展（甚至选择非学术道路）的尊重，等等。
&ems...
http://www.polymer.cn/sci/kjxw14831.html |
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Nature Index 2019全球榜中岛津排名大幅上升
—持续大力度投入研发，成果显现—
Nature Index（自然指数）是统计高水平论文发表信息的数据库，收录了82本独立评选出的高质量自然科学期刊所发表的原创性论文的作者及所属科研机构的信息。该数据库由Nature Research编制。Nature Index提供了接近实时的机构、国家和地区层面的优质研究和合作成果，反映了一个公司或机构的原创性基础研究水平。
在最新的Nature Index 2019全球榜中，岛津在全球企业中...
http://www.polymer.cn/trading/news_detail_11230 |
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张成建在Nature communications上发表论文
含硫高分子主要是指主链含硫原子的一类高分子。脂肪族含硫高分子如聚硫代碳酸酯等或以光气和硫醇等为原料通过缩聚、或经由成环再开环等路线制备，成本较高，至今很少获得生产和应用。矿产单质硫（S）可以作为含硫的单体，另外燃煤、炼油等过程中也产生大量的副产S。但将S直接转化为高分子，需要特别的共聚单体，难度较大。如果能将S与C或者CO通过化学反应生产含硫一碳化合物[C1：如氧硫化碳(COS)、二硫化碳(CS2)]，使其与环氧化...
http://www.polymer.cn/ss/xhzhang/newsshow_5275.html |
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