查询词典 polymerization

The cost of lactide is one of the most important factors that hamper the PLA from widely use for a long time. In this paper a series of apparatus which can boost the product ratio to the utmost was focused on. Meanwhile the factors affecting the molecular weight of PLA in the polymerization were also discussed.

长期以来丙交酯的成本一直是制约聚乳酸推广应用的最重要的因素之一，本文致力于设计出一套能最大限度降低丙交酯成本的工艺过程，并对丙交酯聚合过程中影响聚乳酸分子量的因素进行了初步探讨。

It was shown that high optical purity lactide and crystallization in polymerization led to higher molecular weight PLA using low-toxic zinc lactate as catalyst.

结果表明，合适的裂解温度有利于合成高光学纯度的丙交酯；在低毒乳酸锌的催化作用下，高光学纯度的单体以及聚合过程中的结晶都有利于制备高分子量聚乳酸。

Second, the commonly used ring-opening polymerization between glycerol and lactide for the preparation of degradable polyurethane network was replaced with the more simple and economic method, which is polycondensation between lactic acid and glycerol.

其次，我们用乳酸和丙三醇的直接缩聚代替常用的较为复杂的丙交酯和丙三醇的开环聚合法用于可降解聚氨酯交联网络的制备。

This review focused on the reasearch progress of polylactide synthesised either by direct polycondensation of lactic acid or ring-opening polymerization of lactide at home and aborad in recent years.

综述了近年来国内外聚乳酸直接合成法和丙交酯开环聚合法的研究进展，对聚乳酸改性方法进行了深入的总结和评述，并揭示了聚乳酸材料的研究开发前景。

As compared with the lactide ring-opening polymerization, the direct melting copolymerization of LA and CL is proved more practicable and simpler.

与丙交酯开环聚合二步法相比，LA与CL直接熔融共聚的合成工艺简单易行。

In addition, astudy was conducted to understand the influence the nature and size of the central lanthanide metalhas on the polymerization.

另外，还研究了镧系中心金属原子的性质和大小对聚合反应的影响。

Mixed the redundant portion of it and other waste water, joins the sodium hypochlorite, limewater and polymerization aluminum chloride coagulant mix precipitates, could discharged after reaching the standards.

对清洗硅粉的部分废水可以用来做七水硫酸镁精制时的配制水。

The RAFT polymerization of NIPAM exhibited pseudo-first-order kinetics and a linear molecular weight dependence on monomer conversion.

NIPAM的原位RAFT聚合为一级反应动力学，分子量随聚合时间的增加呈线性增长。

The whole experiment process was divided into three parts - reduction roasting pyrite cinder, vitriol lixiviation and catalytic-oxidation polymerization, the optimum condition was defined in every part, and the production quality and flocculation performance were tested, good results were gained.

本实验采用还原焙烧、硫酸浸取、催化氧化聚合的工艺制取聚合硫酸铁，确定了各个阶段的最佳工艺条件，并对制取的PFS进行了产品质量检验和水处理效果实验，取得了良好效果。

Based on a detailed investigation of present utilization and recovery ofpyrite cinder, the preparation process of poly ferric sulphate was discussed in this article and good results were gained. The whole experiment process was divided into three parts - reduction roasting pyrite cinder, vitriol lixiviation and catalytic-oxidation polymerization.

本课题结合重点企业委托的实际科研项目，以武钢金山店铁矿硫酸厂的硫铁矿渣为主要原料，在对目前硫铁矿烧渣回收及利用现状进行综合考察的基础上，探讨利用硫铁矿烧渣制取高附加值的无机高分子絮凝剂PFS的制备工艺，取得了良好的效果。

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！