The process conditions in the stages of esterification, melt polymerization and solid state polymerization were discussed.
讨论了酯化反应，熔融聚合，固相聚合阶段的工艺条件。
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。
The results show that high-molecular weight PLA can be prepared by the direct melt condensation polymerization at suitable technological condition and the product has good biodegradability.
结果表明：采用适当的工艺能通过熔融缩聚法制备出高分子质量的聚乳酸，且具有良好的生物降解性能。
The influence of melt polycondensation and solvent refluxing methods of lactide polymerization and chain extension agents on relative molecular weight of polylactide was studied.
研究了乳酸熔融缩聚和溶剂回流脱水缩聚两种聚合方法及几种扩链剂对乳酸聚合物相对分子质量的影响。
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。
Polypropylene is the trade name of polypropylene fiber, which is by the polymerization of propylene as raw material by the melt spinning of fibers obtained.
丙纶是聚丙烯纤维的商品名称，它是由丙烯作原料经聚合、熔体纺丝制得的纤维。
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。
As for melt time of resin, HPMC, PVA, polymerization vessel may affect it.
对于树脂的熔融时间，HPMC、不同醇解度的PVA、聚合釜均有较大影响。
The double - melt behavior, thermal stability of soild state condensation polymerization of PET and the crystallization, expansibility of PET bottle have been studied by DSC, TGA and TMA.
应用dsc、TGA和TMA研究了固相聚合pet树脂的双重熔融行为、热稳定性及瓶坯、包装瓶的结晶性能和膨胀性。
Compared with other catalysts, CSI catalyst is more suitable for producing high-melt index polypropylene in the batch bulk polymerization plant.
CS I型催化剂适用于在间歇本体聚丙烯装置上生产高熔体指数聚丙烯。
Compared with other catalysts, CSI catalyst is more suitable for producing high-melt index polypropylene in the batch bulk polymerization plant.
CS I型催化剂适用于在间歇本体聚丙烯装置上生产高熔体指数聚丙烯。
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