采用N-乙烯基吡咯烷酮(NVP)作为辅助接枝单体,利用熔融接枝法将直链型(“Ⅰ”型)和“Y”型2种含氟聚乙二醇大分子单体(fPEGA)键合到苯乙烯类热塑性弹性体(STPE)分子链上,以降低STPE的疏水性.深入考察了接枝反应参数和fPEGA的化学结构对接枝反应的影响.研究表明:当NVP/fPEGA摩尔比大于2.0时,fPEGA的接枝效率可达55％以上;丙烯酸酯类单体的接枝活性明显高于甲基丙烯酸酯;由于空间位阻效应,“Y”型含氟PEG的接枝效率低于直链型单体.两亲性大分子接枝链中含氟组分解决了接枝聚合物聚乙二醇(PEG)易于包埋于本体中的问题,明显改善了亲水性.
参考文献
| [1] | Xiaomeng Li;Shifang Luan;Hengchong Shi;Huawei Yang;Lingjie Song;Jing Jin;Jinghua Yin;Paola Stagnaro.Improved biocompatibility of poly (styrene-b-(ethylene-co-butylene)-b-styrene) elastomer by a surface graft polymerization of hyaluronic acid[J].Colloids and Surfaces, B. Biointerfaces,2013:210-217. |
| [2] | Luan, S.;Zhao, J.;Yang, H.;Shi, H.;Jin, J.;Li, X.;Liu, J.;Wang, J.;Yin, J.;Stagnaro, P..Surface modification of poly(styrene-b-(ethylene-co-butylene)-b-styrene) elastomer via UV-induced graft polymerization of N-vinyl pyrrolidone[J].Colloids and Surfaces, B. Biointerfaces,2012:127-134. |
| [3] | Li, X.;Luan, S.;Yuan, S.;Song, L.;Zhao, J.;Ma, J.;Shi, H.;Yang, H.;Jin, J.;Yin, J..Surface functionalization of styrenic block copolymer elastomeric biomaterials with hyaluronic acid via a "grafting to" strategy[J].Colloids and Surfaces, B. Biointerfaces,2013:146-154. |
| [4] | G. Moad .The synthesis of polyolefin graft copolymers by reactive extrusion[J].Progress in Polymer Science,1999(1):81-142. |
| [5] | Yang, H.;Luan, S.;Zhao, J.;Shi, H.;Li, X.;Song, L.;Jin, J.;Shi, Q.;Yin, J.;Shi, D.;Stagnaro, P. .Improving hemocompatibility of styrene-b-(ethylene-co-butylene)-b-styrene elastomer via N-vinyl pyrrolidone-assisted grafting of poly(ethylene glycol) methacrylate[J].Polymer: The International Journal for the Science and Technology of Polymers,2012(8):1675-1683. |
| [6] | Martinelli E;Menghetti S;Galli G;Glisenti A;Krishnan S;Paik MY;Ober CK;Smilgies DM;Fischer DA .Surface Engineering of Styrene/PEGylated-Fluoroalkyl Styrene Block Copolymer Thin Films[J].Journal of Polymer Science, Part A. Polymer Chemistry,2009(1):267-284. |
| [7] | Matthews SE.;Threadgill MD.;Pouton CW. .A biodegradable multiblock co-polymer derived from an alpha,omega-bis(methylamino)peptide and an alpha,omega-bis(oxiranylmethyl)poly(ethylene glycol)[J].Journal of Controlled Release: Official Journal of the Controlled Release Society,2000(2/3):129-139. |
| [8] | Wang, Y.;Dong, Q.;Wang, Y.;Wang, H.;Li, G.;Bai, R. .Investigation on RAFT polymerization of a y-shaped amphiphilic fluorinated monomer and anti-fog and oil-repellent properties of the polymers[J].Macromolecular rapid communications: Publishing the newsletters of the European Polymer Federation,2010(20):1816-1821. |
| [9] | Krishnan, S.;Paik, M.Y.;Ober, C.K.;Martinelli, E.;Galli, G.;Sohn, K.E.;Kramer, E.J.;Fischer, D.A. .NEXAFS depth profiling of surface segregation in block copolymer thin films[J].Macromolecules,2010(10):4733-4743. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%