摘要
研究了聚酯丙烯酸酯(Polyesteracrylate,PEA)类多官能团物质的用量、官能团数目、辐射交联剂量等因素对聚己内酯(Polycaprolactone,PCL)的辐射交联规律、动态力学等性能的影响。结果表明,多官能团PEA的加入可以显著提高PCL辐射交联的效率;而且对较低分子量的聚合物的敏化效果更加明显。相同剂量时,官能团数目越多、用量越大的样品,生成的凝胶含量越多,强化辐射交联效应越大,据此对多官能团物质强化辐射交联的机理进行了分析和讨论,主要是多官能团物质的双键打开直接参与了交联反应。添加多官能团PEA后的辐射交联规律不再遵从Charlesby?Pinner关系式,却较好地符合陈欣方?刘克静?唐敖庆公式。动态力学分析(Dynamicmechanicalanalysis,DMA)表明,聚己内酯强化辐照交联后的弹性模量和耐热性能显著提高。
Sensitizing effects of polyfunctional polyester acrylate （PEA） on radiation cross-linkage of PCL were studied in this paper. Influences of the added amount of PEA, number of the functional groups, and irradiation dose on dynamic mechanical properties of the cross-linked PCL samples were investigated. It was concluded that efiiciency of radiation cross-linking of the PCL samples could be improved markedly after applying the polyfunctional naterials. The more the number of the functional groups and the more amount of the functional groups, the more the gel content and the more distinctive radiation cross-linking effects. Mechanisms of the enhanced radiation cross-linking effect were discussed. It appeared that the double bonds broken from molecule chains of the polyfunctional naterials s by the ionizing radiation had been of help to the cross-linking reactions. In addition, it was found that the radiation cross-linking of PCL in presence of the polyfunctional naterials could be described by the Chen-Liu-Tang relation, rather than the classical Charlesby-Pinner equation. The DMA analysis indicated that the radiation cross-linked PCL had higher heat deformation temperature with a wide rubbery state plateau.
出处
《辐射研究与辐射工艺学报》
EI
CAS
CSCD
北大核心
2005年第4期201-206,共6页
Journal of Radiation Research and Radiation Processing
基金
上海市科学技术委员会科研计划项目(03JC14008)资助
关键词
聚己内酯
敏化辐射交联
辐射交联
多官能团化合物
聚酯丙烯酸酯
Polycaprolactone, Radiation cross-linking, Sensitizing, Polyfunctional compound, Polyester acrylate
