相容剂对LLDPE/PET共混材料性能的影响  

Effects of Compatibilizers on Properties of LLDPE/PET Blends

作　　者：贾鹏飞 程书文 薛峰 何和智 黄思淇 

机构地区：[1]华南理工大学聚合物新型成型装备国家工程研究中心聚合物成型加工工程教育部重点实验室,广东广州510640

出　　处：《塑料》2017年第3期39-42,46,共5页Plastics

摘　　要：选用不同相容剂对LLDPE/PET共混材料进行增容改性,研究了不同相容剂对LLDPE/PET共混材料力学性能、热性能、流变性能和微观形貌的影响。结果表明:相容剂的加入,能够明显提升共混材料的力学性能,当相容荆含量为3%时,拉伸强度比未加相容剂时最大提升了25.4%,相容剂含量为9%时,冲击强度最大提升了156%。随着相容剂含量的增加,共混材料的熔体流动性逐渐降低,两相基体熔点向中间温度变化,LLDPE结晶温度和结晶度先减小后增大,过多的相容剂会起到成核剂的作用。微观形貌分析表明:相容剂能够降低分散相粒径大小,增加界面黏结性。综合来看,LLDPE-g-MAH对共混材料相容性的提升效果要优于LDPE-g-GMA。The blends of LLDPE/PET were compatibilized by different compatibilizers, and the effects of LLDPE/PET blends on mechanical properties, thermal properties, rheologica] properties and microphotographs were studied. The results showed that the addition of eompatibilizers could obviously improve the mechanical properties of blends, when the compatibilizer content was 3%, the tensile strength of blends maximumly increased by 25. 4% than that without compatibilizers,and when the compatibilizer content was 9% , the impact strength maximumly increased by 156%. With the increase of compatibilizer content,the melt flowability of blends gradually declined,the melting points of two phases changed to the middle temperature of them ,the crystallization temperature and crystallinity of LLDPE decreased first then increased, and excessive eompatibilizers could act as nucleating agents during the crystallization. The microstructure analysis showed that compatibilizers could decrease the particle size of PET and improve the interracial compatibility of blends. Overall, the improvement effect to the blends by L LDPE-g-MAH was better than LDPE-g-GMA.

关 键 词：相容剂 共混材料 力学性能 热性能 微观形貌 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]