摘要
采用熔融共混法制备了聚丙烯(PP)/纳米二氧化硅(nano-SiO_2)复合材料,用偏光显微镜、差示扫描量热仪研究了PP/nano-SiO_2复合材料的凝聚态结构,并用扫描电子显微镜、透射电子显微镜观察了nano-SiO_2粒子在PP中的相容性和分散性。结果表明,分散于PP中的nano-SiO_2粒子影响了PP的凝聚态结构,球晶尺寸变小,球晶边界模糊,PP的结晶和熔融温度分别增加了6.5%和2.6%;PP/nano-SiO_2复合材料在硅烷偶联剂(KH-560)与增容剂马来酸酐接枝聚丙烯(PP-g-MAH)的协同作用下,nano-SiO_2粒子在PP基体中的相容性增加,粒子与基体界面结合良好,团聚少,分散好,PP的冲击强度增加了40%。
Polypropylene （PP）/nano- SiO2 composites were prepared by melting blending, and their condensed structure was investigated by means of polarized lig h t microscope and differential scanning calorimetry. The results indicated that incorporation of nano- SiO 2 particles not only enhanced the crystallinity of PP but also decrease the size of spherulites along with a fuzzy boundary. As a result, the crystallization temperature and melt temperature increased by 6. 5 % and 2. 6 %,respectively. Moreover, the presence of K H-560 silane coupling agent and maleic anhydride-grafted PP enhanced the compatibility between nano- SiO 2 particles and PP matrix. This leads to an improvement in interfacial adhesion and a better dispersion of nano- SiO2 particles in the matrix, thus resulting in an increase in impact toughness by40 %.
出处
《中国塑料》
CAS
CSCD
北大核心
2017年第2期65-71,共7页
China Plastics
关键词
聚丙烯
纳米二氧化硅
凝聚态结构
相容性
结晶度
polypropylene
nano silicon dioxide
condensed state structure
compatibility
crystallinity
