文献类型：期刊文献

英文题名：SYNTHESIS, CHARACTERIZATION AND IN-VITRO OXIDATIVE STABILITY OF α,ω-BIS(3-AMINOPROPYL) - POLY[(3,3,3-TRIFLUOROPROPYL)METHYLSILOXANE] MODIFIED POLYURETHANEUREAS

作者：Liu Cao[1,2];Hu Chunpu[1,2]

机构：[1]E China Univ Sci & Technol, 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：2010

期号：1

起止页码：1

外文期刊名：ACTA POLYMERICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000276421000001)】；

语种：英文

外文关键词：Polyurethaneurea; Elastomer; Oxidative stability; Surface property; Microphase separation; Fluorinated siloxanes

摘要：In order to simplify the synthesis procedure, alpha, omega-bis(3-amiopropyl)-poly[(3,3,3-Difluolopiopyl)methylsdoxane] (FPS) was directly synthesized from 1,3,5-trimethyl-1,3,5-tris(3',3',3'-trifluoropropyl)cyclotrisiloxane and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane via anionic ring-opening polymerization. The FPS modified polyure thaneureas (FSPUU) were further synthesized with poly(tetramethylene) glycol (PTMG)/FPS as mixed soft segments, and 4, 4'-methylenediphenyl drisocyanate/ethylene diamine as hard segments. Surface properties of the polyurethanurea (PUU) specimens measured by contact angle measurements,attenuated total reflectance Fourier transform infra-red spectroscopy (ATH-FTIR) and X-ray photoelectron spectroscopy (XPS) indicated that the surface hydrophobicity of the FSPUU films increased with increasing the content of FPS clue to the enrichment of fluorine atoms at the surface region. Morphological studies through FTIR and DSC revealed that the incorporation of FPS segments into PUU macromolecular chains induced phase mixing. The oxidative stability of the FSPUU examined in vitro by immersing the films with 200 mu m thickness in an oxidative solution (H2O2-CoCl2) showed that the degree of degradation for all FSPUU films was lower than that of PDMS modified PUU (MSPUU), and the oxidative stability for these FSPUU films was fairly enhanced with increasing the content of FPS, which could be attributed to the lowering of swelling ratio in H2O and H2O2 as well as the permeation rate of H2O in FSPUU films. Furthermore, the tensile strengths of all FSPUU films are higher than those of MSPUU films.