| 超高分子量聚苯乙烯中的正电子寿命谱 |
| |
| 引用本文： | 张水合 齐陈泽. 超高分子量聚苯乙烯中的正电子寿命谱[J]. 核技术, 1998, 21(4): 227-229 |
| |
| 作者姓名： | 张水合 齐陈泽 |
| |
| 作者单位： | 兰州大学 |
| |
| 摘 要： | 以２，３－二氰基－２，３－二（ｐ－Ｘ取代苯基）丁二酸二乙酯（Ｘ＝Ｈ，ＣＨ３，Ｃｌ）为引发剂，用本体法合超高分子量聚苯乙烯，研究了不同引发剂对苯乙烯聚合物正电子湮没寿命谱的影响。通过比较聚合物的分子量和自由体积，表明引发剂的分解速率对自由体积有较大的影响，而浓度对自由体积的影响不大。
|
| 关 键 词： | 引发剂 超高分子量 聚苯乙烯 正电子寿命谱 |
Positron lifetime spectra of superhigh molecularweight polystyrenes |
| |
| ZHANG Shuihe QI Chenze WANG Baoyi WANG Tianmin. Positron lifetime spectra of superhigh molecularweight polystyrenes[J]. Nuclear Techniques, 1998, 21(4): 227-229 |
| |
| Authors: | ZHANG Shuihe QI Chenze WANG Baoyi WANG Tianmin |
| |
| Abstract: | The high molecular weight polystyrenes are synthesized by use of diethyl 2,3-dicyano-2,3 di(p-X substituted phenyl) succinate (X=H, CH3, C1) initiators. The influence of different initiators on the positron annihilation spectra are studied by comparing polystyrectes' molecular weight and free volume. The results indicate that the decomposition rate of initiator has effect on free volume, but initiator's density has no great effect on free volume. |
| |
| Keywords: | Initiators Superhigh molecular weight polystyrenes Positron lifetime spectra Free volume |
| 本文献已被 CNKI 维普 等数据库收录！ |
