摘要
通过共缩聚反应合成了不同ＰＥＧ分子量的ＰＥＴ－ＰＥＧ共聚脂，采用ＤＳＣ法测定了共聚物的结晶性能、结晶速度。还测试了共聚物的力学性能。结果表明：ＰＥＧ的加入能有效地增加分子链柔性，改善结晶性能，其中ＰＥＴ－ＰＥＧ６０００在１００℃的半结晶时间为０７ｍｉｎ。ＰＥＧ的含量在２０％以下，拉伸性能没有恶化，冲击强度、断裂伸长率大大提高。
The PET-PEG copolymers with different PEG molecular weight were synthesized through condensation polymerization. The crystal properties and mechanical properties of PET-PEG copolyesters were studied.The results showed that the polymer chain became easy to move and the crystal property was improved.The crystal rate of PET-PEG 6000 copolymer could attain to 0 7 minutes at 100℃.When the content of PEG was below 20%,the tensile strength of the copolyester almost did not change ,the Izod impact strength and elongation at break of the system were greatly improved.
出处
《塑料》
CAS
CSCD
1999年第1期34-37,共4页
Plastics
