【摘要】 用 γ射线照射壳聚糖使之发生辐射降解 ,研究了降解反应的动力学、辐射对壳聚糖脱乙酰化度的影响以及大分子链的断链机理 .结果表明 :壳聚糖在γ射线照射下发生的辐射降解遵循无规降解动力学规律 ;降解过程中壳聚糖的脱乙酰化度略有升高 ;降解反应主要由壳聚糖分子链上的 C1 — O— C4键断裂引起 ,在降解过程中生成了 δ-内酯结构的端基 .更多还原

【Abstract】 Chitosan was degraded by ⁶0Co γ-ray irradiation. The degradation kinetics, effect of irradiation on the degree of deacetylation（DE） of chitosan and the main chain scission mechanism have been studied. The results showed that the irradiation degradation of chitosan obeys the rule of random degradation. On irradiaton, DE was slightly raised and some of the C₁—O—C₄ bonds broke. Terminal groups with structure of δ-lactone appeared produced during degradation.更多还原