1)  ring-opening polymerization
开环聚合法
2)  ring-opening polymerization
间接开环聚合法
1.
The of polylactic acid(PLA) was obtained by ring-opening polymerization and the synthesis conditions to get 444,848 molecular weight were optimized.
采用间接开环聚合法合成了平均分子量为 444 ,848的聚乳酸 ,并对合成工艺作了优化。
3)  open-loop
开环
1.
Generalized Open-loop Response Control of H_2/N_2 Ratio of Synthetic Ammonia;
合成氨氢氮比的广义开环响应控制
2.
The open-loop step driving theory and method of AC servo motor were studied.
研究了交流伺服电机开环步进运行的原理与具体实现方法,提出了一种PWM死区开环补偿方法,提高了步进状态下的电流幅值控制精度和步距均匀性。
3.
In combination with open-loop and outer-loop power control,the inner-loop power control under some conditions such as different channel environments and different control parameters has been simulated.
针对TD-SCDMA系统的特点,基于其系统中内环功率控制的方法,提出了一种基于线性预测参数的内环功率控制算法,结合开环、外环功率控制,对不同信道条件、不同控制输入参数的内环功率控制进行了仿真,结果表明,该算法可以适当补偿路径损耗和慢衰落,对系统性能的提高有一定的益处。
4)  Ring-opening
开环
1.
The techniques for aromatics saturation and ring-opening of cycloalkanes related to hydropyrolysis of aromatics into steamcracker feeds were reviewed and the feasibility of comprehensive utilization of surplus aromatics by this route was outlined.
分析了未来芳烃可能过剩的原因,综述了芳烃催化加氢裂解制备乙烯裂解原料相关的芳烃饱和技术以及环烷烃开环技术,指出利用该途径实现综合利用过剩芳烃的可行性。
5)  ring cleavage
开环
1.
The effect of methanol, formic acid and aqueous ammonia as nucleophiles on the ring cleavage of 1 was investigated.
8%文献值), 首次采用低碳液态醇实现 1 的开环反应, 产物为 FOX-7。
2.
The overall yield of nitration and ring cleavage was 19.
开环试剂为甲酸时,最优条件下两步反应(收率分别为20。
6)  ring opening
开环
1.
Its hydrogenation activity in aromatics saturation and ring opening activity were investigated.
芳烃加氢饱和及开环反应是一种提高柴油十六烷值的有效途径。
参考词条
补充资料:环烯烃开环聚合
分子式:
分子量:
CAS号:

性质:环烯烃(如环戊烯)在钨(或钼)氯化物与烷基铝组成的催化剂存在下开环聚合,生成主链中含双键的链状聚合物的过程。其反应历程是环烯烃先与钨(或钼)配位活化,然后双键打开并易位使环不断扩大,最后通过自断裂或调节剂获得线型长链分子。所用单体是环烯烃或取代的单环、双环单烯烃,其中钨系催化剂催化环戊烯聚合制得的反式聚戊烯弹性体,其性质优于顺丁橡胶。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。