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5. EFFECT OF POLYMERIZATION DEGREE ON MICROSTRUCTURE OF POLYETHYLENE GLYCOL STUDIED BY POSITRON ANNIHIL

EFFECT OF POLYMERIZATION DEGREE ON MICROSTRUCTURE OF POLYETHYLENE GLYCOL STUDIED BY POSITRON ANNIHIL

来源 :核技术：英文版 | 被引量 : 0次 | 上传用户：yangyng

【摘 要】

：

Positron lifetimes in polyethylene glycol (PEG) polymer have been measured as a function of polymerization degree N (N = 25 - 500). It is observed that all the

【作 者】

：

王采林 王波 李世清 王少阶 姚宁 

【机 构】

：

WuhanUniversityWuhan430072China,WuhanUniversityWuhan430072China,HubeiProvincialInstituteofChemistryR

【出 处】

：

核技术：英文版

【发表日期】

：

1993年4期

【关键词】

：

Potitron ANNIHILATION POLYETHYLENE GLYCOL FREE-VOLUME hole DEFECT Potitron annih 

【基金项目】

：

The Project Supported by National Natural Science Foundation of China

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Positron lifetimes in polyethylene glycol (PEG) polymer have been measured as a function of polymerization degree N (N = 25 - 500). It is observed that all the positron parameters are strongly dependent on N when N≤250, and then tend to constant levels wh

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