摘要
采用纳米CaCO3作为载体制备了负载型β-成核剂及其β-成核-PP,用DSC和XRD研究了载体纳米CaCO3用量和负载型β-成核剂用量对成核PP结晶与熔融行为和β-PP含量的影响,并与传统β-成核剂庚二酸钙(CaHA)成核PP比较。结果表明,负载型β-成核剂比β-成核剂CaHA成核PP具有高的结晶温度,负载型β-成核剂成核PP结晶温度随其用量增加而提高,但随载体用量增加而降低。负载型β-晶成核剂β-成核作用高于CaHA成核剂,β-PP含量达90%以上;且负载型β-晶成核剂成核PP的β-PP含量受成核剂用量和成核剂中载体用量影响不大。
A nano-calcium carbonate supported calcium pimelate （CallA） β-nucleating agent and β-nucleated PP was prepared. The influences of the content of support nano-calcium carbonate and supported β-nucleating agent on crystallization behaviors, melting characteristics and the content of β-PP were investigated by differential scanning calorimeter （DSC） and wide-angle X-ray diffraction （WAXD） analyses, and compared with calcium pimelate （CallA） nucleated PP. The results indicated that PP nucleated by supported β-nucleating agent showed higher crystallization temperature than that of CallA nucleated PP. The crystallization temperature and melting temperature of PP nucleated by supported β-nucleating agent increased with increasing the content of supported β-nucleating agent and decreased with increasing the content of the support nano-calcium carbonate. The content of β-iPP in the PP nucleated by supported β-nucleating agent was higher than that of CallA nucleated PP. Further more, the content of β-PP was independent on the content of supported β-nucleating agent and nano-calcium carbonate.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第3期51-55,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金资助项目(50873115)
高等学校博士生学科点专项科研基金资助项目
广东省科技计划资助项目(0711020600002)
关键词
β-晶成核剂
β-聚丙烯
结晶
熔融
β-nucleating agent
β-polypropylene
crystallization
melting
