Star polymers often are researched as branched model in order to simplify intricate branch configuration of dendrimers and to obtain branched information of polymers.
回顾了结构性能独特且应用颇为广泛的非线性星形聚合物研究现状;介绍了星形聚合物的特点、应用,以及通过活性聚合制备星形聚合物的不同合成方法,比较了各种合成方法的优缺点;综述了星形聚合物用作研究聚合物的支化模型、简化树形聚合物复杂的支化结构、获得聚合物支化信息的研究进展。
High melt strength polypropylene (HMSPP) with long chain branched struc-ture and low gel fraction was achieved with 60Co-γirradiation in the presence of di-functional monomers.
研究结果表明,在普通聚丙烯中加入双官能度敏化剂SR213,再经60Co-γ射线辐射后,可以制得具有长链支化结构、微凝胶含量的高熔体强度聚丙烯。
Effect of concentration and charging methods of n dodecyl mercaptan on MW, MWD and branching of polychloroprene;
正十二硫醇对氯丁橡胶相对分子质量及其分布和支化程度的影响
Several new modified demulsifiers were synthesized by the chain expending and branching of polyether B61.
B61聚醚用己二酸扩链引入羧基官能团,然后用三乙撑四胺、D-山梨醇、D-木糖、季戊四醇等对扩链产物进行支化,合成了若干扩链支化型破乳剂。
In this paper,the effect of branching and crosslinking structure on the impact strength was studied using self-plastication and post self-plastication.
本文研究了漆膜结构中的交联和支化程度对抗冲击强度的影响关系 ,并通过调节交联密度和使用一元饱和脂肪酸对罩光漆进行支化改性 ,大大提高了丙烯酸粉末罩光漆的抗冲击强度 。
The Arrhenius equations of urethane and branch reactions are obtained respectively: k 1 =27 17 exp(-19 79/R T ), k 2 =5 886 exp(-22 86/R T ).
提出一种新的测试聚氨酯预聚物合成反应过程中氨酯化反应和支化反应的动力学参数的理论模型 。
This value is closely related to the type and consistency of branch.
用１３ＣＮＭＲ技术研究了不同支化链的高密度聚乙烯的支化种类及支化浓度，考察了支化对其密度及结晶度的影响。
The micro branch high molecular weight poly(phenylene sulfide)(MBHMWPPS)was prepared from sulfur and P-dichlorobenzene (P-DCB) in polar organic solvent by useing 1,2,4-trichlorobenzene( TCB) as third monomer([TCB]/[P-DCB]<1.
用硫磺、对二氯苯为原料，在极性有机溶剂中，以１，２，４－三氯苯作共聚反应第三单体，共缩聚制得了微支化型高分子量聚苯硫醚（ＰＰＳ）树脂，在缩聚反应中，第三单体量一定时，一定时间内聚合物对数低切变粘度值与反应时间具有线性关系。