水溶性聚酯的热性能  

Thermal properties of water-soluble polyester

作　　者：孙福[1] 凌荣根[1] 钱建华[1] 陈文兴[1] 俞传坤 

机构地区：[1]浙江理工大学材料与纺织学院,浙江杭州310018 [2]荣盛石化股份有限公司,浙江杭州311247

出　　处：《纺织学报》2009年第8期5-7,共3页Journal of Textile Research

基　　金：浙江省重大科技攻关项目(2005C11027-01);先进纺织材料与制备技术教育部重点实验室(浙江理工大学)优秀青年人才培养基金资助项目(07121);荣盛石化股份有限公司科技合作资助项目(0601210)

摘　　要：为给水溶性聚酯(WSP)的纺丝工艺提供参数,通过示差扫描量热(DSC)分析、热重(TG)分析、流变性能分析、熔融指数对水溶性聚酯的熔点、热稳定性、熔体流动性等相关热性能进行表征。结果表明:与常规聚酯(PET)相比,WSP的结晶能力破坏严重,熔点降低显著;WSP在350℃以下热稳定性能良好,但在350℃以上WSP的热失重比PET明显;在相同的剪切速率及相同温度下,WSP的剪切黏度比PET高;WSP的表观黏度随温度和压力的增加而减小,但当温度达到270℃以上时,WSP的表观黏度随温度和压力的变化趋势减弱。In order to provide parameters for spinning processing of water-soluble polyester （WSP）, the melting point, thermal stability, rheological property of WSP were characterized by differential scanning calorimetry （DSC）, thermo-gravimetric analysis （TGA）, and rheometer, melting index analysis （MI）. The results showed that compared with the common polyester （PET）, the crystallization performance of the WSP was destroyed seriously, the melting point dropped remarkably, its thermal stability is very good below 350 ℃, however above 350℃ its weight loss is obvious quicker than that of PET. The shear viscosity of WSP is higher than that of PET when shear rate and temperature are the same. The apparent viscosity of WSP is decreased with increasing of temperature and pressure, but its change tendency along with temperature and pressure is weakening when the temperature reaches to 270 ℃.

关 键 词：水溶性聚酯 熔点 热稳定性 流变性 

分 类 号：TQ342[化学工程—化纤工业]