摘要
用扫描电子显微镜 (SEM )、差式扫描量热法 (DSC)和热重法 (TGA)表征了经过γ 射线辐照的高密度聚乙烯 (γ HDPE)与尼龙 6 (PA 6 )共混物 (γ HDPE/PA 6 )的聚集态结构 ,研究了材料聚集态结构的改变与其阻隔性能间的关系。SEM结果表明 ,PA 6与γHDPE相容性的变化 ,在所研究的共混体系中 ,PA 6与7γHDPE相容性最好。DSC表征结果显示 ,HDPE的链结构的改变影响了其与PA 6链段之间的相互作用 ,γ HDPE/PA 6体系中 ,7γHDPE与PA 6分子链间相互作用力较强。TGA结果表明 ,不同的γ HDPE与PA 6的共混物结构差别明显。阻隔性能测试表明 ,PA 6与γHDPE相容性的增加和分子链间相互作用力的增强有助于其阻隔性能的提高。7γHDPE/PA 6对二甲苯具有良好的阻隔性 ,吸油率与HDPE和HDPE/PA 6相比分别下降了 30 %和 2 6 %左右。
High-density polyethylene(HDPE) was oxidized in oxygen atmosphere under γ-ray irradiation to give γ-HDPE, which was then blended with polyamide 6(PA-6). The aggregation structure of γ-HDPE/PA-6 blends and the relationships between the blend structure and its barrier property have been studied by SEM, DSC and TGA. The SEM results show that the γ-irradiation changes the compatibility of PA-6 with γ-HDPE, and in all blends studied 7γ-HDPE/PA-6 has the best compatibility. The results of DSC show that the interaction between the chains of γ-HDPE and PA-6 are affected by the HDPE chain structure, and the strongest interaction occurs in 7γ-HDPE/PA-6 blend. The increase of the compatibility and chain interaction in 7γ-HDPE/PA-6 blend lead its better barrier property to xylene than HDPE, HDPE/PA-6 and others γ-HDPE/PA-6 blends. The oil absorption ratio of 7γ-HDPE/PA-6 blends decreased about 30% and 26%, respectively, in comparison with pure HDPE and HDPE/PA-6 blend.
出处
《应用化学》
CAS
CSCD
北大核心
2004年第3期305-308,共4页
Chinese Journal of Applied Chemistry
基金
教育部博士点基金 (2 0 0 0 0 0 3 5 80 5 )资助
关键词
高密度聚乙烯
尼龙-6
γ-射线辐照
相结构
共混
阻隔性能
high density polyethylene,polyamide 6,γ-ray irradiation,compatibility,blend,barrier property
