WANG Yuhai, ZHANG Zishou, TAO Youji, et al. Study on Crystallization and Melting Behavior of UV Photo-oxidative Degradated PP/nano-CaCO3 Composites[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2010,49(5):67-71.
WANG Yuhai, ZHANG Zishou, TAO Youji, et al. Study on Crystallization and Melting Behavior of UV Photo-oxidative Degradated PP/nano-CaCO3 Composites[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2010,49(5):67-71.DOI:
The crystallization and melting behavior of UV photo-oxidative degradated PP/nano-CaCO
3
(PP/CC) and its composites modified by compatibilizers were investigated by DSC and WAXD analyses. The results indicated that with increasing the UV exposure time
the melting temperatures of PP decreased and degree of crystallization of PP increased. The crystallization temperature of PP first increased and later decreased and the crystallization temperature of PP in PP/CC composites decreased
especially its composites modified by compatibilizers. The crystallization temperatures of UV photo-oxidative degradated PP/CC were higher than that of PP. It is attributed to the heterogonous nucleation of nanoCaCO3. The crystallization temperatures of PP/CC composites modified by PP-g-MA and POE-g-MA were higher than that of unmodified composites. However
the crystallization temperatures of UV photo-oxidative degradated PP/CC composites modified by compatibilizers were lower than that of unmodified composites. It is suggested that the UV photo-oxidative degradation resulted in the decreased heterogonous nucleation of carboxylate salts formed by the chemical reaction between compatibilizer and nano-CaCO
3
particles.
关键词
聚丙烯纳米复合材料紫外光老化结晶与熔融行为
Keywords
polypropylenenanocompoaitesUV photo-oxidationcrystallization and melting behavior