摘要
用直接酯化法合成了一系列不同 PGE含量的 PET- PEG(聚对苯二甲酸乙二醇酯-聚乙二醇 )嵌段共聚物。用 FTIR、H1- NMR等测试手段对嵌段共聚物的序列结构进行分析。证明 PET- PEG嵌段共聚物的组成与投料比非常接近 ;其分子链结构特征是以硬段 PET封端的多嵌段共聚物 ;PEG含量影响大分子链的序列结构 ,随 PEG含量的增加 ,硬段长度减小 ,软段长度增加。
PET- PEG block copolymers with different PEG contents were synthesised by direct es- terification.The sequence structure of PET- PEG block copolymers was analyzed by Fourier Transform Infra- Red specroscopy(FTIR)、 H1 - Nuclear Magnetic Resonance spectroscopy (H1 - NMR) methods.Itwas concluded thatthe composition of PET- PEG block copolymers was very near the reactantratio,the macromolecular chain was polyblock sealed by hard seg- ment,the hard segmentlength was decreased and the softsegment length was increased with the increase of PEG contents.
出处
《合成技术及应用》
1998年第1期1-6,共6页
Synthetic Technology & Application
关键词
嵌段共聚物
序列结构
PET
PEG
聚酯
聚醚
polyethylene terephthalate (PET)
polyethylene glycol (PEG)
block copolymer
sequence structure
hard segment
soft segment
