The synthesis and thermal stability of poly(L-lactide)were investigated.
对聚丙交酯的合成和热稳定性进行了研究。
It was found that poly (L-lactide) is thermally unstable above its melting temperature.
实验表明在高于聚合物熔点温度以上，聚丙交酯表现出热不稳定性。
Preparation technique was ameliorated in order to improve purity and yield of L-lactide.
为提高L -丙交酯的纯度和产率，对l -丙交酯的制备技术进行改进。
Butyl lactate was synthesized by the ester exchange reaction of d, L-lactide and n-butanol under the catalysis of sulfuric acid.
研究了D,L -丙交酯在浓硫酸催化作用下与正丁醇进行酯交换反应合成乳酸丁酯的条件。
Poly(L-lactide)(PLLA) was synthesized by ring-opening polymerization of L-lactide using cyclic tin alkoxide compound as initiator.
以环烷氧锡化合物引发L-丙交酯开环聚合制备高分子量聚L-乳酸。
So here we will take the way of the Equal Channel Angular Extrusion (ECAE) to process poly (d, L-lactide) to improve its properties.
本研究采用等通道转角挤压技术对聚(d,L -)乳酸进行自增强研究，并测试其增强后的降解性能。
ML-PLLA was synthesized by ring-opening polymerization of L-lactide in the presence of mannitol, it has the characteristic of low melt viscosity.
丙交酯在甘露糖醇分子上引发聚合得到的ML—PLLA具有低熔体粘度的特性。
Recently, poly (d, l-lactide) -poly (ethylene glycol) (PLA-PEG) block copolymers have been widely applied owing to the favorable biodegradability and biocompatibility.
聚乳酸-聚乙二醇嵌段共聚物因具备良好的生物可降解性和相容性而得到广泛应用。
The resulted D, L-lactide and glycolide were found to have ring structure by fourier transform infrared spectrometry and proton nuclear magnetic resonance(1H NMR) spectrometry.
通过傅立叶红外光谱和氢核磁谱（1H NMR）测试表明所合成的丙交酯和乙交酯具有环状结构。
Using the difference of the hydrolysis speed in the water between meso-lactide and other lactides, high pure L-lactide was obtained by water washing-four times recrystallization.
利用内消旋丙交酯在水中水解的速度大于其它丙交酯的特点，用水洗和四次重结晶相结合的提纯方法，获得了高纯的L-丙交酯。
Using the difference of the hydrolysis speed in the water between meso-lactide and other lactides, high pure L-lactide was obtained by water washing-four times recrystallization.
利用内消旋丙交酯在水中水解的速度大于其它丙交酯的特点，用水洗和四次重结晶相结合的提纯方法，获得了高纯的L-丙交酯。
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