疏水改性聚对苯二甲酸乙二醇酯的合成与表征  

Synthesis and characterization of hydrophobically-modified poly(ethylene terephthalate)

作　　者：王雪[1] 金剑[1,2] 肖长发[1] 

机构地区：[1]天津工业大学改性与功能纤维天津市重点实验室,天津300160 [2]中国纺织科学研究院生物源纤维制造技术国家重点实验室,北京100025

出　　处：《纺织学报》2011年第4期12-17,共6页Journal of Textile Research

摘　　要：以羟基氟硅聚合物(FGX)为改性剂,与对苯二甲酸双羟乙酯低聚物(BHET)缩聚,合成疏水改性共聚酯(MPET)。通过对接触角的测定,分析MPET表面性能与合成工艺路线、改性剂黏度及改性剂加入量的关系。同时,利用傅里叶红外光谱(FT-IR)和核磁共振氢谱(1H-NMR)及热分析对MPET结构进行分析和讨论。FT-IR和1 H-NMR的分析结果表明,FGX与BHET低聚物共聚合反应形成了以化学键结合的MPET,如在低真空状态下加入12%黏度为2 Pa.s的FGX后,合成所得改性共聚酯(MPET-12)的水接触角可达97.2°,表面能为23.4 mJ/m2,接近FGX表面能(20 mJ/m2)。由于改性剂加入量少,MPET的热性能较常规聚对苯二甲酸乙二醇酯(PET)并无明显变化。Hydrophobically-modified copolyester（MPET） was synthesized from bis（2-hydroxyethyl） terephthalate（BHET） by polycondensation using hydroxy-fluorosilicone polymer（FGX） as the modifier.Through the measurement of contact angle,the relationship between surface properties of the modified copolymer and synthesis route,viscosity and quantity of modifier was investigated.Fourier transform infrared spectroscopy,nuclear magnetic resonance spectroscopy and thermal analysis were used to examine the structure of MPET.FT-IR and 1H-NMR analysis showed that MPET with chemical bond was formed by FGX and BHET copolymerization.By adding 12% of the FGX viscosity 2 Pa.s under low vacuum,the water contact angle of the modified polyester（MPET-12） can be up to 97.2°,and the surface energy of the modified polyester is 23.4 mJ/m2,which is close to that of FGX（20 mJ/m2）.Due to the small quantities of modifier,the thermal property of MPET has little change when compared with poly（ethylene terephthalate）（PET）.

关 键 词：共聚 改性共聚酯 疏水性 表征 

分 类 号：TQ342[化学工程—化纤工业]