交酯

The in situ graft copolymerization of starch with D, L-lactide was investigated.

研究了在聚乙二醇存在下，淀粉与丙交酯的原位熔融接枝反应。

Hydroxyl octanoic acid(1) was synthesized from heptaldehyde by a four-step reaction of nucleophilic substitution,displacement reaction,acid hydrolysis and deaminization.

以正庚醛为原料，经过亲核取代、置换反应、酸水解及碱化脱氨等4步反应合成了制备3，6-二己基-1，4-二氧杂-2，5-二酮的中间体——α-羟基辛酸(1)；1经对甲苯磺酸催化脱水得辛交酯。

It is reported that polylactide is the most promising fracture-fixing material which is degradable in the body.

文献报导聚丙交酯是最有希望的可体内降解的骨折固定材料。

The effects of dehydration temperature, ratio of dehydration, catalyst dosage, polymerization and depolymerization temperature on the yield of D, L-lactide were studied.

考察了制备过程中脱水温度、脱水率、催化剂量、聚合温度和解聚温度对丙交酯产率的影响。

PDLLA/β-TCP composite was obtained by mixing β-TCP and DLLA in a certain proportion prior to ring-opening polymerization when Sn2 as initiator in a vacuum circumstance and a constant oscillation.

以辛酸亚锡作引发剂，将一定比例的β-磷酸三钙与DL丙交酯混匀后在真空体系下开环聚合，并持续均匀振荡，得到PDLLA/β-TCP复合材料。

PDLLA/β TCP composite is obtained by mixing β-TCP and DLLA in a certain proportion prior to ring-opening polymerization using Sn2 as initiator in a vacuum circumstance and a constant oscillation.

以辛酸亚锡作引发剂，将一定比例的β-磷酸三钙与DL丙交酯混匀后在真空体系下开环聚合，并持续均匀振荡，得到PDLLA/β-TCP复合材料。

The results indicated that control of water in the reaction system was very important to the formation of lactide.

结果表明，所选择的各模型反应为吸热反应且近似可逆，水的控制对丙交酯的形成很重要。

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。

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。

The orthogonal design method is adopted, by changing catalyst category, catalyst quantity, reaction time, reaction temperature, to select the optimum conditions for lactide synthesis.

实验采用正交设计方法，通过改变催化剂种类、催化剂用量、脱水时间、环化时间四个主要影响因素进行实验，根据实验结果选择最好的丙交酯制备的实验方案。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。