摘要
本文用动态力学谱和^(13)C NMR方法分别测定了丙烯酸-1,1,5-三氢全氟戊酯与丙烯酸共聚物为基础的离聚体的玻璃化转变温度T_s和^(13)C自旋-自旋驰豫时间t_2,用描述高分子主链链段运动的VJGM模型计算了所测样品的链段运动活性。结果表明,离聚体样品的玻璃化转变温度与离聚体大分子链运动活性密切相关,大分子的微观链段运动越困难,玻璃化转变温度越高。
The glass transition temperature of ionomers based on co'polymers of 2,2,3,3,4,4,5,5-octafluoropentyl ester acrylate and acrylic acid are measured by means of dynamic mechanics. The carbon-13 spin-spin relaxation times of ionomers are measured by using nuclear magnetic resonance techniques. The parameters of polymer chain motions for ionomers with same functional group contents, different ionization degree and different metal ions are calculated by using VJGM motional model. The results show that the glass transition temperature of ionomers are related to the motional activities of polymer chain segments. The more difficult the motions of polymer chain segment are, the greater the glass transition temperature are.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1992年第3期1-5,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金
关键词
丙烯酸
玻璃化
转变温度
离聚体
glass transition temperature, ionomer chain dynamics, spin-spin relaxation times.
