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- Keywords oxetane;cationic ring-opening polymerization;active chain end mechanism;active monomer mechanism;ion conductivity; 氧杂环丁烷;阳离子开环聚合;活性链端机理;活性单体机理;电导率;
- active chain end mechanism 活性链端机理
- Keywords hydroxyl terminated polyepichlorohydrin;cationic ring-opening polymerization;activated monomer mechanism;activated chain end mechanism; 端羟基聚环氧氯丙烷;阳离子开环聚合;活性单体机理;活性链端机理;
- Macromonomer usually contains a polymerizable group on one chain end, so that it can be copolymerized with a conventional monomer. 由于大分子单体具有特殊的结构和性质,它代替传统的稳定剂参与分散聚合,具有实验操作过程简便,制得微球表面洁净,粒径呈单分散性等优点。
- It mainly manufactures automobile fittings, fork fittings, diesel engine fittings and high strength bolts and nuts etc and relevant products chain fittings (bolt roller sleeve plate chain end joint etc.). 主要生产汽车配件、叉车配件、柴油机配件及高强度螺栓、螺帽等零部件及相关产品、链条配件(销铀、滚子、套筒、板式链端接头等)。
- Using poly(methyl methacrylate) (PMMA) with a bromine atom at the chain end, which was prepared by ATRP, as the macroinitiator, a diblock copolymer PMMA-b-poly(1-(butoxy)ethyl methacrylate) (PMMA-b-PBEMA) was synthesized by means of ATRP of BEMA. 通过ATRP制备末端带有溴原子的聚甲基丙烯酸甲酯(PMMA),并以其为大分子引发剂进行BEMA的ATRP,制备了嵌段共聚物PMMA-b-PBEMA。
- Eventually, the initial part of the hash chain ending in the removed element will be garbage collected. 最终,原始hash链中被删除的元素将会被垃圾收集。
- The orient has been playing an active role in the world economy. 亚洲一直在世界经济中发挥积极作用。
- The design calculation process and related process methods for transmission ratio, gear transmission, end mechanic sealing and eccentric short roller bearing used for 180 turbine drill are described. 叙述了180涡轮钻具用减速器的传动比,齿轮传动,端面机械密封和偏心短圆柱轴承的设计计算过程和有关处理办法。
- He is an active member of the school's stamp club. 他是学校集邮俱乐部的一名活跃会员。
- An active volcano may explode at any time. 活火山随时都有可能爆发。
- The chain has fallen foul of plants in the water. 链条已和水中的植物缠绕在了一起。
- Is it wise to engage in active sports at your age? 我这样的年纪积极参加体育活动是否明智?
- She has a gold chain about her neck. 她在脖子的周围挂着一根金项链。
- She was active as a left-winger in the party. 她是党内积极的左翼分子。
- He was very active and rode down several horses. 他劲头很大,一连骑了好几匹马。
- She plays an active part in local politics. 她积极参与地方政治活动。
- The chain has run foul of some plants in the water. 铁链缠在水中的一些植物上。
- The steel market will continue to be active. 钢材市场将会继续保持活跃。
- She wore a silver chain around her neck. 她脖子上戴着一条银项链。