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含高相对分子质量氟化聚硅氧烷链段的水性聚氨酯脲的制备与性能(英文)    

Preparation and properties of waterborne polyurethane-ureas containing fluorinated polysiloxane segments with high relative molecular mass

文献类型:期刊文献

中文题名:含高相对分子质量氟化聚硅氧烷链段的水性聚氨酯脲的制备与性能(英文)

英文题名:Preparation and properties of waterborne polyurethane-ureas containing fluorinated polysiloxane segments with high relative molecular mass

作者:苏腾[1];王贵友[1];胡春圃[1]

机构:[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份:2009

卷号:32

期号:2

起止页码:158

中文期刊名:合成橡胶工业

外文期刊名:China Synthetic Rubber Industry

收录:CSTPCD;;Scopus;CSCD:【CSCD_E2011_2012】;

基金:Supported by Shanghai Leading Academic Discipline Project(B502)

语种:中文

中文关键词:水性聚氨酯脲;氟化聚硅氧烷;数均相对分子质量;耐水性;力学性能

摘要:以数均相对分子质量(M-n)较高(8 361~21 760)的α,ω-二羟基聚甲基(3,3,3-三氟丙基)硅氧烷(PTFPMS)、聚酯二元醇、二羟甲基丙酸、异佛尔酮二异氰酸酯和乙二胺为原料,制备了一系列贮存稳定性优良的大分子主链中含有少量(质量分数为5%)长PTFPMS链段的聚氨酯脲(PUU)水分散液,并对其性能进行了研究。结果表明,与未改性或用低相对分子质量(M-n为798)PTFPMS改性的PUU水分散液相比,用高相对分子质量PTFPMS改性的PUU水分散液的粒径减小;含高相对分子质量PTFPMS链段的PUU水分散液成膜后,其表面疏水性和力学性能比纯PUU水分散液有很大程度的提高,而比含低相对分子质量(M-n为798)的PTF-PMS链段的PUU水分散液有一定程度的提高。关键词:水性聚氨酯脲;氟化聚硅氧烷;数均相对分子质量;耐水性;
In recent years, waterborne polyurethane (PU) and polyurethaneurea (PUU) have attracted increasing interest for stringent environmental requirements. In order to further enhance the water resistance and surface hydrophobicity, the waterborne PU is often modified with polydimethylsiloxane (PDMS) , but the lowering of mechanical properties of PDMS-modified PU is generally observed. In the previous study , we reported that the water resistance and mechanical properties of waterborne PUU could be enhanced markedly by modification with a small number ( mass fraction 5% ) of α, ω-dihydroxypoly [ (3, 3,3-trifluoropropyl) methylsiloxane ] (PTFPMS) with number-average molecular mass (Mn) of 798. In this study, a series of PUU aqueous dispersions were prepared from the PTFPMS with high Mn (8 361 - 21 760), isophorone diisocyanate, polyester polyol, dimethylolpropionic acid (DMPA) and ethylene diamine. The mass fraction of DMPA and PTFPMS were 4% and 5% (based on the total mass of PUU ) , respectively.

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