中文摘要：

本文以0～60 kGy 60 Co γ射线辐照的明胶为对象，研究了辐照剂量与明胶的黏度、胶凝特性、力学性能、蛋白组分、分子质量的关系。结果表明：明胶的特性黏度、相对黏度、凝胶强度、断裂伸长率、分子质量与剂量呈良好的负相关；明胶的γ、β、α链含量随剂量的增加而减少，大分子链的降解伴随着小分子多肽链混合物的增加，相对分子质量分布逐渐加宽；明胶膜的断裂强度升高而断裂伸长率下降；辐照后明胶表面结构致密而平滑。在有限水和无限氧气存在条件下，辐照明胶以降解为主，同时伴随着少量的交联，剂量越大，反应程度越高。

英文摘要：

The gelatin was irradiated for 0-60 kGy dosages by 60Co γ-ray . The relationship of dosage and properties including viscosity , gel strength , mechanical property ,molecular weight and protein component was discussed . The results show that there is a negative correlation between the dosage and intrinsic viscosity ,relative viscosity ,gel strength and molecular weight .With the increase of irradiation dosage , the γ,β,αchain content of gelatin decreases but the small molecules content increases , and relative molecular weight distribution changes wider .The elongation decreases but tensile strength of gelatin film increases . Compared with no irradiation one , the irradiation gelatin has more compact and smooth surface texture .It is assumed that＆amp;nbsp;when the limited water and oxygen exist during the irradiation process ,cross-linking and degradation of gelatin molecular produce simultaneously and the main reaction is cross-linking .The reaction degree increases with the dosage .