聚氧化乙烯R-150辐射共聚水凝胶膜的理化性能研究

STUDY ON THE PROPERTIES OF POLY(ETHYLENE OXIDE) R\|150 HYDROGEL FILMS FORMED BY IRRADIATION CROSSLINKING

本工作研究了聚氧化乙烯 Ｒ１５０ 与聚乙烯醇（ Ｐ Ｖ Ａ）经辐射共聚交联所形成的水凝胶膜的理化性能。实验结果表明：聚氧化乙烯 Ｒ１５０ 共聚水凝胶的交联密度与辐射剂量呈正相关，与混合物质量分数呈负相关，与聚乙烯醇含量则未见明显相关性；该水凝胶的交联密度明显低于单纯聚乙烯醇水凝胶的交联密度。聚氧化乙烯 Ｒ１５０ 共聚水凝胶的平衡水含量与辐射剂量和聚乙烯醇含量呈负相关，与其混合物质量分数呈正相关，并且明显高于单纯聚乙烯醇的平衡水含量。聚乙烯醇水凝胶的硬度与辐射剂量呈正相关；聚氧化乙烯 Ｒ１５０ 共聚水凝胶的硬度与其混合物质量分数呈负相关，而与聚乙烯醇含量呈正相关。混合物质量分数对聚氧化乙烯 Ｒ１５０ 共聚水凝胶理化性能的影响与聚氧化乙烯 Ｒ１５０ 和聚乙烯醇的双重作用有关。

The chemical and physical properties of the PEO R\|150 blend hydrogel films formed by electron beam irradiation of the blending solutions of PEO R\|150 and poly(vinyl alcohol)(PVA) are studied. The experimental results indicate that the crosslinking densities of the PEO R\|150 blend hydrogels increase along with the increase of the irradiation doses and decrease with the increase of the blend mass fractions. While the PVA contents have no obvious effects on the crosslinking densities of the blend hydrogels. The crosslinking densities of the blend bydrogels are obviously lower than those of the pure PVA hydrogels. The equilibrium water contents of the blend hydrogels decrease as the irradiation dose and the PVA contents increase, but they increase as the blend mass fractions increase. The equilibrium water contents of the blend hydrogels are obviously higher than those of the pure PVA hydrogels. The hardness of the PVA hydrogel films increases with the irradiation doses. The hardness of the blend hydrogels decreases with the blend mass fractions, whereas it increases with the PVA contents. The effect of the blend mass fraction on the properties of the blend hydrogels is mainly ralated to the both polymers.\;