摘要
本文用正电子湮没技术对超高分子量聚乙烯退火处理后的结构进行了研究．用ＰＡＴＦＩＴ—８８软件分析了正电子湮没谱，给出了在１００℃条件下，样品的结晶度．自由体积和自由体积分数随退火的变化．实验证明，结晶度．自由体积和自由体积分数在退火初期变化最快，随着退火时间增加变化趋于平缓．这一结果与Ｗｕｎｄｅｒｌｉｃｈ提出的理论相一致。
Abstract Investigation of the structures of annealled UHMWPE samples are carried out by PAT. A PATFIT-88 software was used to analyze the resulting PAS. It is found that the crystallinity, the free volume and the free volume fraction of the samples vary upon annealed at 100℃ for different time.These variables are having the greatest changes when the annealing begin. The results can be explained with the theory proposed by Wunderlich for annealled polymer samples.
基金
国家自然科学基金
中国科技大学结构研究开放实验室资助
