不同形态纳米粒子对PET纳米复合物熔融结晶行为的影响  

Melting and recrystallization behavior of poly (ethylene terephthalate) nanocomposites

作　　者：刘晨[1] 李鹏[1] 路向辉[1] 薛祺[1] 

机构地区：[1]西安近代化学研究所,西安710065

出　　处：《化工新型材料》2013年第10期115-117,共3页New Chemical Materials

摘　　要：通过step-scan DSC(SDSC)来研究PET纳米复合物等温结晶的熔融重结晶行为,研究了结晶时间,纳米粒子含量以及纳米粒子形态对PET纳米复合物熔融重结晶行为的影响。PET纳米复合物在熔融过程中出现双峰,这主要是由于熔融重结晶引起的。随着结晶时间的增加PET复合物低温峰强度逐渐增大而高温峰则逐渐减小;而纳米粒子含量增加,低温峰强度减小,高温峰强度增大;当纳米粒子含量相同时,PET/Attapulgite(PET/At)双峰的强度以及峰位都要高于PET/SiO2,SiO2含量从0.5%增加到2%,PET/SiO2双峰强度有一个突变。The melting and recrystallization behavior of poly（ethylene terephthalate）（PET）nanocomposites after isothermal crystallization from the melt was studied by step-scan differential scanning calorimetry（SDSC）. The influences of isothermal crystallization time, nanopaticle contents and the morphology of nanopaticles on the melting and recrystallization process were examined. With the increase of crystallization time and the decrease of nanoparticle contents, the intensity of the low temperature endotherm increased while that of the high temperature endotherm decreased. With the same nanopaticle contents, the intensity of both high and low temperature endotherm of poly（ethylene terephthalate）（PET）/Attapulgite （At） nanocomposites were stronger than that of poly（ethylene terephthalate） （PET）/SiO2 nanocomposites. When the SiO2 content changed from 0.5% to 2%, there was a step change of the two endotherm of PET/SiO2 nanocomposites.

关 键 词：STEP-SCAN DSC PET纳米复合物 重结晶 缠结网络 

分 类 号：TB383.1[一般工业技术—材料科学与工程]