RGFP News

One paper was published in Polymer


2019-07-19

    Recently, one paper titled as “A dense hybrid network of epoxide hyperbranched polyurethane and benzoxazine with improved thermomechanical properties via tuning its curing reaction and physical state” by Chi Zhang et al. was published on Polymer. Zhang is a doctoral candidate supervised by Dr. Yuhong Liu. (Paper link to10.1016/j.polymer.2019.121659)

 

In order to reveal the effect of curing reaction and such physical state as gelation and vitrification on the microstructure and the resulting thermo-mechanical properties, a series of epoxidized hyperbranched polyurethane (EHPU) modified benzoxazine resin (BZ) blends (BE) were fabricated. The self-polymerization or the copolymerization of BZ and EHPU was successfully realized via tuning its curing cycle at different curing temperature. The ether cross-link was realized from the copolymerization between oxazine ring and epoxy groups, which can dilute the rich benzene ring of BZ and weaken the hydrogen bonding of pure BZ. As for BE with 10 wt% of EHPU, both a high cross-link density and an excellent thermomechanical property can be obtained with the curing cycle of entering the vitrification state in the initial stage and then transferring it into the post-curing. As thus, the study provides a novel strategy in fabricating a dense network via tuning the curing reaction and physical state. 

=====================================================================================================

祝贺博士研究生张驰同学的论文发表

  日前,博士研究生张驰同学(第一作者)的论文发表在Elsevier出版的学术期刊Polymer上,论文题目为“A dense hybrid network of epoxide hyperbranched polyurethane and benzoxazine with improved thermomechanical properties via tuning its curing reaction and physical state”。

  该论文揭示了固化反应对环氧化超支化聚氨酯改性苯并噁嗪树脂的微观结构和机械性能的影响,提供了一种通过调整固化反应和物理状态来制造致密交联网络的新策略。论文的通讯作者是张驰同学的指导教师刘育红副教授。