文献类型：期刊文献

英文题名：Synthesis, characterization and in vitro oxidative stability of poly(3,3,3-trifluoropropyl)methylsiloxane modified polyurethaneurea

作者：Liu, Cao[1,2];Hu, Chun Pu[1,2]

机构：[1]Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：94

期号：2

起止页码：259

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20090211853755);WOS:【SCI-EXPANDED(收录号:WOS:000263212700019)】；

语种：英文

外文关键词：Fluorinated polysiloxanes; Polyurethaneurea elastomers; Hydrogen bonding; Microphase separation; Oxidative stability; Surface properties

摘要：A series of alpha,omega-bis(3-hydroxypropyl)-poly[(3,3,3-trifluoropropyl)methylsiloxane] (FPS) with different molecular weights were synthesized and characterized, then the FPS modified polyurethaneurea (FSPUU) elastomers were further synthesized with poly(tetramethylene glycol)/FPS as soft segments and 4,4'-diphenylmethane diisocyanate/ethylene diamine as hard segments. The surface properties of the FSPUU films were measured. It was found that the surface hydrophobicity of these FSPUU films was enhanced with increasing the molecular weight of FPS, due to the enrichment of FPS segments at the surface region. Oxidative stability of the FSPUU films was examined in vitro by immersing the films with 200 mu m thickness in oxidative solution (H2O2/CoCl2) for 21 days. The experimental results showed that the degree of degradation of all FSPUU films was lower than that of polydimethylsiloxane modified polyurethaneurea (MSPUU), and the oxidative stability of these FSPUU films was fair enhanced with increasing the molecular weight of FPS, which could be attributed to the lowering of swelling ratios in H2O and 20% H2O2, as well as the permeation rate of H2O in FSPUU films. Furthermore, the tensile strength of all FSPUU films is higher than that of MSPUU film. (C) 2008 Elsevier Ltd. All rights reserved.