摘要
用核磁共振法表征了间歇乳液共聚合制备的氯乙烯-异丁基乙烯基醚(VC-IBVE)共聚物的结构,讨论了共聚物组成与性能的关系。结果发现,共聚物中VC摩尔分数随聚合转化率的增大而减小;共聚物组成对其在甲苯中的溶解性和溶液粘度有很大影响,当IBVE质量分数[ω(IBVE)]大于或等于13.9%时,共聚物可溶于甲苯;溶液粘度随ω(IBVE)的增大而减小;共聚物的玻璃化转变温度随ω(IBVE)的增大而降低,并符合Gordon-Taylor方程。
The structure of vinyl chloride-isobutyl vinyl ether (VC-IBVE) copolymer prepared by batch emulsion copolymerization was characterized by hydrogen spectrum of nuclear magnetic resonance ( 1H-NMR). The influences of composition on solubility, solution viscosity and glass transition temperature ( T _g) of the copolymer were investigated. The results demonstrate that the vinyl chloride (VC) content decreases as polymerization conversion increases. The composition of VC-IBVE has a significant effect on its solubility in toluene and viscosity of the resultant solution. When the mass fraction of IBVC [ ω (IBVE)] in copolymer is higher than or equal to 13.9%, VC-IBVE copolymer is soluble in toluene. As ω (IBVE) rises, the viscosity of VC-IBVE solution in toluene decreases and the T _g of the copolymer lowers, conforming to Gorden-Tayler equation.
出处
《合成树脂及塑料》
CAS
2004年第6期54-56,共3页
China Synthetic Resin and Plastics
