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。
Using PET chips produced from different polymerization routes as material, the high viscosity PET was prepared by re-melt polycondensation.
本文采用不同路线合成的PET切片为原料，重新熔融缩聚制备高粘度PET。
Meanwhile, various stabilizers were used to promote the heat stability of the high viscosity PET, and some ideas were given for preparing high viscosity PET by melt polymerization.
并使用多种稳定剂来改善高粘度树脂的热稳定性，提出了用熔融法制备高粘度PET的一些设想。
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