摘要
为了探究包覆结构的形成与剪切温度和基体分子量的关系,采用了等规聚丙烯(iPP)/玻璃纤维(GF)复合材料单纤维牵引体系。通过固定纤维牵引速率、逐步降低剪切温度(低于基体熔点)的方法,对实时采集的偏光显微镜图片进行了详细分析。结果表明:对于同一基体,包覆结构的厚度随剪切温度的升高而降低,且基体分子量越低,这一变化趋势越明显;对于同一剪切温度,包覆结构的厚度随基体分子量的增加而增大;形成包覆结构的最高剪切温度随基体分子量的增加而升高。
The single fiber-pulling system of isotactic polypropylene （iPP） / glass fiber composites was used to explore the rela- tionship between the formation of coating structure and shearing temperature as well as matrix molecular weight. Based on the fixed fiber-pulling speed and decreasing shearing temperature （just below the melting temperature）, polarized optical micrographs could be analyzed in detail. The results revealed that for one iPP matrix, the thickness of coating structure decreased with the in- crease of shearing temperature, and lower matrix molecular weight lead to a more obvious variation tendency. For one shearing temperature the thickness of coating structure increased with the increment of matrix molecular weight. Furthermore, the maxi- mum shearing temperature also enhanced with the addition of matrix molecular weight. This present work offers powerful and di rective evidence that shearing temperature and matrix molecular weight play important roles in the formation of coating structure.
出处
《中国科技论文》
CAS
北大核心
2015年第10期1182-1184,1202,共4页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20124101110010)
关键词
复合材料
聚丙烯
剪切温度
基体分子量
包覆结构
composite
polypropylene
shearing temperature
matrix molecular weight
coating structure
