查询词典 polymerization

It was found that VAC can be smoothly photografted onto LDPE film with"film combination"system, e. g. conversion percent and grafting efficiency are 70％ and 76％, irrespcetively, with UV intensity of 5400μw/cm〓 and irradiation time of 3min. The reaction orders of polymerization rate to monomer concentration and photoinitiator concentration are about 1 and 0.76, irrespectively, showing that chain transfer reaction takes place with much ease in VAC/LDPE system.

发现利用本文所设计的方法可将VAC快速地接枝在LDPE膜表面，如在光强为5400μw/cm〓，光照3min时，转化率和接枝效率可分别达到70％和76％；聚合反应速率对单体的反应级数约为1，而对光引发剂的反应级数为0.76，说明VAC光接枝聚合中链转移反应占相当大的比例。

This dissertation was designed to study heteto-phase grafting polymerization of vinyl acetate , maleic anhydride and VAC/MAH binary monomer system, irrespectively, with low density polyethylene film as substrate and benzophenone as photoinitiator. The purpose is to develop new and more effective methods to modify the surface and buck properties of polyolefines by studying the grafting mechanism of the system and exploring the characteristics of the grafting process.

本文主要以低密度聚乙烯膜为基体膜，以二苯甲酮为光引发剂，分别对醋酸乙烯酯、马来酸酐以及VAC/MAH的非均相接枝聚合反应进行了系统研究，以探讨相关的接枝反应机理、接枝反应过程以及接枝工艺的可行性，目的在于建立聚烯烃材料本体和表面改性新方法。

By analyzing the mechanism of isobutylene polymerization, a new catalyst for synthesis of highly reactive polyisobutylene from mixed C4 fraction was prepared.

在分析聚异丁烯聚合机理的基础上，进行了合成高活性聚异丁烯催化剂的研究，研制出了一种适用于利用混合碳四合成高活性聚异丁烯的催化剂体系，并探索了聚合反应规律。

The experimental results showed that the catalytic activity for the polymerization of isoprene is dominated by the rate constant of absolute propagation in this system.

研究结果表明：该体系催化活性低的主要原因是其绝对增长速度常数太低。

The kinetics of the bulk precipitation polymerization of isoprene with the supported titanium catalyst was studied at 0-30℃.

采用负载钛催化剂，在0～30℃下对异戊二烯本体沉淀聚合的动力学进行了研究。

Depending upon reaction conditions, the product may be a polyketone formed b y addition polymerization of the ketene double bond

随着反应条件的不同，产物可以是由烯酮的双键加成聚合得到的聚酮。

Ketenes, notably dimethyl ketene, readily undergo oligomerization and polymerization

烯酮，特别是二甲基烯酮，很容易齐聚和聚合。

The polymerization condition of lactide is studied in this paper.

本文研究了丙交酯酸的聚合条件，用DSC和TGA表征了聚合物的热性能。

PLA has been produced by ring-opening polymerization of lactide or direct polycondensation of lactic acid.

制备聚乳酸常通过乳酸的直接聚合或丙交酯的开环聚合两种方法。

It included the synthesis of lactide, the purification of lactide, the polymerization of lactide and the compositess analysis and so on.

包括丙交酯的制备、提纯、聚合及复合材料性能的表征一系列研究工作。

It seems likely that Kraft will return with a better offer.

看起来卡夫要重新考虑一个更好的出价了。

But he'd rather burn off my feelers and watch me squirm.

可他却放任那个家伙对我为所欲为！