摘要
为了研究回收PET对PP流变行为的影响,用双螺杆挤出机制备了PP/回收PET和增容PP/回收PET共混物,研究了回收PET用量、不同相容剂对PP/回收PET共混物的动态流变行为的影响。结果表明,PP/回收PET共混物的复数黏度随回收PET含量增加而降低,具有明显的剪切变稀特性。PP-g-MA提高回收PET复数黏度,但PP-g-GMA降低共混物的复数黏度,表明回收PET与PP-g-MA的化学作用较PP-g-GMA强。PP-g-MA提高PP/回收PET共混物的动态弹性模量,但PP-g-GMA使共混物的动态弹性模量和动态黏性模量降低。PP-g-MA加入使PP/回收PET共混物tanδ降低,但PP-g-MA用量过高,tanδ反而提高;PP-g-GMA使共混物的tanδ提高,归结于相容剂的增容和增塑作用。
In order to investigate the effect of recycled PET （r-PET） on the dynamic rheological behaviour of PP, blends of PP/r-PET and compatibilized blends were prepared on a twin-screw extruder. Effects of compatibilizers and r-PET contents on the dynamic theological behaviour of PP blends were investigated. The results showed that the complex viscosity of PP/r-PET blends decreased with increasing the content of r-PET. Addition of PP-g-MA increases the complex viscosity of PET. However, addition of PP-g-GMA decreased the complex viscosity of PET. It indicated that chemical interaction of r-PET with PP-g-MA was higher than that with PP-g-GMA. Addition of PP-g-MA increased the dynamic elastic modulus of PP/r-PET blends. However, addition of PP-g-GMA decreased the dynamic elastic modulus and dynamic viscous modulus of PP/r-PET blends. Addition of PP-g-MA decreased the mechanical loss of PP/r-PET blends. However, the mechanical loss of PP/r-PET blends increased at high content of PP-g- MA. Addition of PP-g-GMA increased the mechanical loss of PP/r-PET blends. It was explained by the plasticization and compatibilization of PP-g-MA
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第1期62-66,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
广东省自然科学重点基金资助项目(06104925)
广东省科技计划资助项目(2008A010500003)
中国电器科学研究院工业产品环境适应性国家重点实验室基金项目
关键词
回收PET
聚丙烯
复数黏度
动态弹性模量
力学损耗
recycled PET
polypropylene
complex viscosity
dynamic elastic modulus
mechanical loss
