摘要
用傅里叶变换光声光谱 (FTIR -PAS)法 ,研究了富氧气氛中高密度聚乙烯 (HDPE)的γ射线辐照氧化 ,辐照时间与HDPE氧化状态之间的关系。用傅里叶变换红外光谱 (FTIR)研究表明 ,经过辐照的HDPE与PA6 (尼龙 - 6 )熔融共混时发生了化学反应 ,改善了相容性 ,扫描电镜(SEM )测试结果也直观地给予了证明。
A study on the oxidation of high density polyethylene (HDPE) by γ ray irradiation in oxygen atmosphere has been made. The influence of irradiated time on the oxidation has been investigated with the help of Fourier Transform Infrared-Photoacoustics Spectroscopy (FTIR-PAS). Results of FTIR-PAS show after irradiation groups like -C=O, -O-C-O-, O=C-O- were introduced into the HDPE. Although the γ ray has powerful penetrability, the oxidation mainly takes place on the surface of HDPE. After 4h irradiation in oxygen (dose rate 66Gy/min.), -C=O is the main group which was introduced into the surface of HDPE. Lengthening the irradiation process makes the pre-produced oxidized section in HDPE surface continue their reactions to yield some oxidation products with the structures of -O-C-O-, O=C-O- and so on. FTIR shows there are reactions or week interaction like hydrogen bond between the irradiated HDPE and PA6 in the binary blends, this is helpful to increase the compatibility of the phase of HDPE and polyamide-6 (PA6) in the blend. Scanning Electron Microscope (SEM) result shows that the interface between HDPE matrix and PA6 domains is much clear and smoother in 0γHDPE/PA6 blends than in 4γHDPE/PA6 and 7γHDPE/PA6 blends. These suggested the miscibility of PA6 and HDPE was improved after HDPE irradiating in oxygen by γ ray radiation.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
北大核心
2002年第4期265-270,共6页
Journal of Radiation Research and Radiation Processing
基金
教育部博士点基金 (2 0 0 0 0 35 80 5 )资助
关键词
光声光谱
γ射线辐照氧化
高密度聚乙烯
相容性
HDFE
PA6
Photoacoustics spectroscopy, Oxidation by γ ray irradiation, High density polyethylene, Compatibility
