PET/ZnO纳米复合材料的制备及结晶性能  

Study on preparation and crystalline properties of PET/ZnO nanocomposites

作　　者：郭又晟 陈延明[1] 王海玥[1] 张文帅 GUO Yousheng;CHEN Yanming;WANG Haiyue;ZHANG Wenshuai(School of Petrochemical Engineering,Shenyang University of Technology,Liaoyang 111003,China)

机构地区：[1]沈阳工业大学石油化工学院,辽宁辽阳111003

出　　处：《中国塑料》2025年第4期25-30,共6页China Plastics

摘　　要：以聚对苯二甲酸乙二酯(PET)和经油酸钠表面修饰的纳米ZnO(4.73 nm)为原料,采用熔融共混工艺路线,通过改变纳米ZnO的添加量(0、0.02%,0.5%,1%)制备了PET/ZnO纳米复合材料。测试了不同降温速率(φ)下样品的差示扫描量热仪(DSC)曲线,结果表明,随着降温速率的增大,PET/ZnO纳米复合材料的结晶温度(Tc)向低温方向移动,结晶峰形逐渐变宽,半结晶时间(t1/2)减小;在相同降温速率下,结晶能力以及结晶速率相比于纯PET得到了提高,并且随着纳米ZnO添加量的增大,复合材料的结晶能力和结晶速率也逐渐增大。通过Jeziorny法对样品的非等温结晶动力学进行研究,表明加入纳米ZnO对PET晶体原有生长方式产生了一定的影响,并且结晶速率常数(Zc)随纳米ZnO添加量的增大而增大,但当添加量为1%时,Zc不再变化。热失重(TG)和热台偏光显微镜(PLM)的测试结果表明,纳米ZnO的加入对PET结晶可以起到有效成核剂的作用,且对PET的热稳定性影响不大。PET/ZnO nanocomposites were prepared through melt blending using polyethylene terephthalate(PET)and sodium oleate-modified nano-ZnO(4.73 nm)as raw materials for at nano-ZnO contents of 0,0.02,0.5,and 1.0 wt%.Differential scanning calorimetry was carried out to investigate the effect of cooling rate on the crystallization behavior of the nanocomposites.The results indicated that the crystallization temperature of PET/ZnO nanocomposites shifted to a low temperature,followed by a gradual increase in the width of crystallization peak,and their half crystallization time al-so tended to decrease with an increase in the cooling rate.In contrast pure PET,the crystallization ability and crystalliza-tion rate of the nanocomposites were improved at the same cooling rate with an increase in the nano-ZnO content.The non-isothermal crystallization kinetics was studied by the Jeziorny′s method.The results indicated that the range of n val-ue varied,indicating that the addition of nano-ZnO generated a certain effect on the original growing mode of PET.The crystallization rate constant(Zc)increased with an increase in the nano-ZnO content.However,the Zc value of the nano-composites almost did not change at a nano-ZnO content of 1.0 wt%.The thermal stability and crystalline morphology of the nanocomposites were further analyzed by thermogravimetric analysis and hot-plate polarizing microscope.The re-sults demonstrated that the incorporated nano-ZnO could act as a nucleating agent for the crystallization of PET,but it had little effect on the thermal stability of PET.

关 键 词：聚对苯二甲酸乙二酯 纳米氧化锌 复合材料 结晶速率 非等温结晶动力学 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]