摘要
用正电子湮没技术研究在聚四氟乙烯辐照接枝过程中的自由体积与正电子湮没寿命谱的关系。吸收剂量、吸收剂量率以及辐照环境等对接枝率有明显影响，而正电子湮没寿命可十分敏感地反映接枝率的变化。接技率的变化规律可用自由体积模型解释。用扫描电子显微镜对样品进行了观察比较。
The positron annihilation technique was applied to study the relation between relative free volume and irradiated graft for PTFE. The results indicate that the relative free volume responds very sensitively to the graft rate. The graft rate can be changed with the variations of absorbed dose, absorbed dose rate and irradiation environment. These rules are discussed in terms of the free volume model and are in agreement with the results from electron microscopy.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1999年第3期211-218,共8页
Atomic Energy Science and Technology
基金
天津市自然科学基金
