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《Acta Polymerica Sinica》 2005-05
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MORPHOLOGY AND MECHANICAL PROPERTIES OF POLY(VINYL CHLORIDE)/NANO-HYDROTALCITE COMPOSITES

WANG Hui, BAO Yongzhong, HUANG Zhiming, WENG Zhixue(State Key Laboratory of Polymer Reaction Engineering, Zhejiang University, Hangzhou 310027)  
Poly(vinyl chloride) (PVC)/nano-hydrotalcite composites were obtained by processing PVC/nano-hydrotalcite composite resins prepared by suspension polymerization of vinyl chloride in the presence of hydrotalcite.The morphology and mechanical properties of PVC/nano-hydrotalcite composites were investigated and compared with those of PVC/nano-hydrotalcite composites prepared by direct melt mixing of PVC and nano-hydrotalcite.It was shown that hydrotalcite particles were dispersed much more homogeneous in PVC composites prepared by the first method.In these composites hydrotalcite particles existed mainly as primary particles of nanoscales with no obvious aggregation.As a result,PVC composites prepared by the first method had better mechanical properties than those prepared by the second method.The tensile strength,Young's modulus and Charpy impact strength of PVC composite increased with increasing the content of nano-hydrotalcite in a range of less than 5 wt%.The thermal stability of PVC composite resin increased as the weight fraction of nano-hydrotalcite increased.The storage modulus and the loss modulus of PVC/nano-hydrotalcite composites were all slightly higher than those of the pristine PVC in the temperature region below and around the glass transition.tanδ and glass transition temperature of PVC/nano-hydrotalcite composites were almost as same as those of the pristine PVC.
【Fund】: 浙江省重大科技攻关资助项目(项目号011101619)
【CateGory Index】: TQ325.3
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