摘要
采用傅里叶红外光谱仪、差示扫描量热仪、扫描电镜及力学性能测试等方法,研究了高密度聚乙烯(PE-HD)经γ射线辐照后分子结构、熔体流动速率、熔点和结晶结构的变化,以及辐照对PE-HD/木粉复合材料力学性能的影响。结果表明,经γ射线辐照后,PE-HD分子链被引入了含氧极性基团(羰基),增加了其分子极性,改善了PE-HD/木粉复合材料的相容性,使PE-HD/木粉复合材料的力学性能得到较大幅度提高,其拉伸强度、弯曲强度分别提高了80%,缺口冲击强度提高了36%。扫描电镜照片显示木粉在PE-HD基体中分散得更均匀,界面结合良好。
The effects of γ-irradiation on the molecular structure, melt flow rate, melting point and crystallization structure of PE-HD and on the mechanical properties of PE-HD/wood powder composites were studied through FT-IR , DSC, TEM, and mechanical properties testing. Because polar groups were generated on the PE-HD chain by γ-irradiation, the interracial adhesion with wood powder was enhanced, and the mechanical properties of the composite were improved. Both tensile and flexural strengths were increased by 80 %, impact strength increased by 36%. SEM micrographs revealed that wood powder was finely dispersed in the polymer matrix.
出处
《中国塑料》
CAS
CSCD
北大核心
2009年第8期75-78,共4页
China Plastics
基金
黑龙江省杰出青年科学基金项目资助(JC04-06)
关键词
聚乙烯
木粉
木塑复合材料
辐照
polyethylene
wood powder
wood-plastics composite
γ-irradiation
