Effect of main - chain structure on solid - phase grafting polymerization of styrene in spherical polypropylene granules 主链结构对聚丙烯球形粒子中苯乙烯固相接枝聚合的影响
Unsaturated polyphosphoester ( uppe ) containing unsaturated double bonds in main chain was synthesized with fumaric acid , 1 , 2 - propylene glycol and phosphorous oxychloride as the initiation materials 摘要以富马酸和三氯氧磷为起始原料，合成了主链重复结构单元中含不饱和双健的聚磷酸酯。
Mdsc and tga results showed that the terpolymer exhibited an extremely high glass transition temperature and decomposition temperature when compared to the copolymer from po and co2 结果表明这些三元共聚物具有较高的分子量，且玻璃化转变温度随着主链上的环己撑碳酸酯含量增加而逐渐升高。
When the graft ratio was high , the hydrophilic side chain was long and the molecular mass of the main chain of the hydrophilic matrix was great , the diffusion of pp - g - peg in pp blends would be poor , and the diffusion coefficient would also be small 接枝率越高、亲水性侧链的长度越长，亲基体主链摩尔质量越大，接枝共聚物在聚丙烯共混体系中的迁移扩散性能越差，扩散系数越小。
First to heat pvc and sulfur together at a certain temperature , where the melted sulfur being a fine dehydrogenating agent , captured hydrogen from pvc bone chain and led to an electrially conductive polymer with conjugated electrons 采用聚氯乙烯与单质硫在一定的温度下加热处理,在熔融状态下的单质硫作为良好的脱氢氧化试剂,使聚氯乙烯主链脱氢形成具有共轭电子的导电聚合物。
Main - chain type aromatic polymers , being used as conductive polymer , are now invoking more and more interests because of their many advantages , such as good thermal and chemical stabilities , low density but robustness and facility to process 摘要主链型芳香族聚合物具有热稳定性高、化学稳定性好、质地轻且牢固以及良好的加工成型性等优点，其作为导电聚合物材料的应用正受到人们越来越多的关注。
The synthesis technology of various liquid rubbers with different active group terminated , such as hydroxyl - terminated , carboxyl - terminated , isocyanate - terminated , ami - no - terminated , mercaptan - terminated and various main chains like polybutadiene , polyurethane , polystyrene were reviewed with 23 references 摘要综述了端羟基、端羧基、端异氰酸酯基、端氨基、端巯基等活性端基，以及聚丁二烯、聚氨酯、聚苯乙烯等不同主链结构的液体橡胶的合成技术。
This article reviews recent progress in research on the preparation , thermal properties and orientation stability of aryl polyimide based second - order nlo materials : host - guest system , maid - chain system , side - chain system and crosslink system , and points out the study direction for future efforts 摘要综述了近年来采用芳香聚酰亚胺为骨架的主客体掺杂型、主链型、侧链型和交联型的二阶非线性光学聚合物材料在合成方法、耐热性和取向稳定性等方面的研究进展情况，并根据目前存在的问题，展望了今后的研究方向。
This is a problem vitally important to both molecular biologists and bioinformatists today . we herein become interests in comparing ( - sheet topologies of protein main - chain , identifying combination of the side - chain , introducing structural mobility into secondary structure and conformation , and simulating enzyme active site fluctuation by intelligent polymer catalysts 本文致力于比较蛋白质主链的( -折叠片拓扑，识别侧链的组合，并将结构的运动性引入二级结构和构象，且用智能高分子催化剂来模拟酶活性部位的涨落。
However , most of those flame retardants will reduce the other properties of materials at the same time . to overcome this drawback , a reactive flame retardant , which was incorporated in the main chain of pet , was used and an intercalative polymerization to layered silicates was conducted so as to prepare novel flame - retardant copolyesters / layered silicate nanocomposites 为了克服这一缺点，我们在引入一种反应型含磷阻燃剂的同时，通过插层聚合的方法合成了一种新型的聚合物材料：主链含磷阻燃共聚酯层状硅酸盐纳米复合材料，以期在提高聚合物阻燃性的同时，亦改善材料的其它性能。
