纸质出版日期:2015,
网络出版日期:2015-9-25
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为提高无规共聚聚丙烯(PPR)冲击强度,制备了庚二酸钙成核PPR和纳米碳酸钙与负载庚二酸钙的纳米碳酸钙填充PPR,采用力学性能测试方法、DSC、XRD和SEM对比研究了其力学性能、结晶性能和β-晶含量。讨论了庚二酸钙和纳米碳酸钙及其负载庚二酸钙的纳米碳酸钙对PPR冲击强度、断裂伸长率、结晶温度和β-晶含量的影响,指出采用负载型β-成核剂是提高PPR韧性的有效方法。
In order to improve the impact strength of polypropylene random copolymer (PPR), the calcium pimelate nucleated PPR, nano-CaCO3and calcium pimelatesupported CaCO3filled PPR were prepared.Their mechanical properties, crystallization behavior and the content of β-modification were studied using mechanical testing, differential scanning calorimetry, wide-angle X-ray diffraction and scanning electron microscopy. The effect of calcium pimelate, nanoCaCO3and calcium pimelate-supported CaCO3on the impact strength, elongation at break, crystallization temperature and β-modification contents of PPR were investigated. The result indicated that using supported β-nucleating agent was an efficient method to increase the β-modification contents and improve the toughness of PPR.
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