作者
D Milicevic, S Trifunovic, S Galovic, E Suljovrujic
发表日期
2007/8/1
期刊
Radiation Physics and Chemistry
卷号
76
期号
8-9
页码范围
1376-1380
出版商
Pergamon
简介
Structure, crystallization behaviour and some thermal properties of poly-l-lactide (PLLA), gamma irradiated up to 300kGy, have been studied. Through differential scanning calorimetry measurements, radiation-induced changes were evident in the enthalpy of melting and cold crystallization, as well as in the degree of crystallinity. Decay of the glass transition, cold crystallization and melting temperatures with irradiation dose was observed in all cases. The annealing treatment, which can substantially reduce the concentration of free radicals, also had a great impact on thermal/crystallization behaviour of irradiated PLLA. Extensive chain scission, as a dominant effect of gamma irradiation, confirmed by gel permeation chromatography, has as a consequence a growth of new thin crystal lamellae and occurrence of the second low-temperature melting peak. Thermogravimetric analyses have shown that irradiation …
学术搜索中的文章
D Milicevic, S Trifunovic, S Galovic, E Suljovrujic - Radiation Physics and Chemistry, 2007