【Polymer】Improving hemocompatibility of styrene-b-(ethylene-co-butylene)-b-styrene elastomer via N-vinyl pyrrolidone-assisted grafting of poly(ethylene glycol) methacrylate
writer：Huawei Yang, Shifang Luan*, Jie Zhao, Hengchong Shi, Xiaomeng Li, Jinghua Yin*, et al.,
keywords：Styrenic thermoplastic elastomer, Melt free radical grafting, Poly(ethylene glycol)
source：期刊
specific source：Polymer, 2012, 53, 1675-1683
Issue time：2012年
Abstract:
In this work, in order to enhance the grafting degree, N-vinyl pyrrolidone (NVP) was used to assist the melt grafting of the macromonomer-poly(ethylene glycol) methyl ether methacrylate (PEGM)-which has good hemocompatible property, onto styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) elastomer with free radical initiator. The grafting degree of PEGM with NVP assistance was increased by at least 4-fold to those without NVP. In addition, side reactions such as homopolyerization of the PEGM monomer during the melt grafting process could be largely reduced in the NVP-assisted system. Both the hydrophilicity and hemocompatibility of the PEGM modified SEBS were highly improved. Comparing to virgin SEBS, the amount of fibrinogen adsorption was reduced by up to 75% in the NVP-assisted grafting samples.