Page 143 - 《精细化工》2019年第11期

第 11 期 李 果，等: 含硫扩链剂改性水性聚氨酯的制备及其性能 ·2291·

表 3 不同 ME-HEA 含量水性聚氨酯胶膜在 120 ℃热老 polyurethane urea dispersions made with mixtures of polyester
化处理前后的拉伸强度 polyol and polycarbonate diol[J]. Progress in Organic Coatings,
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0 1.5 2.9 4.3 5.7 7.1
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 1/MPa 29.8 34.8 41.9 34.3 33.8 32.2 breathable coating[J]. Progress in Organic Coatings, 2017, 103:
 2/MPa 24.9 29.1 35.9 30.9 31.6 31.0 69-75.
100( 2/ 1)/% 83.56 83.62 85.68 90.09 93.49 96.27 [5] Ma L, Song L, Li F, et al. Preparation and properties of poly
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从表 3 可以看出，胶膜热处理后的拉伸强度分 waterborne polyurethane emulsions derived from alcoholysis
别占热处理前拉伸强度的 83.56%、83.62%、85.68%、 products of waste PET and its effect on properties[J]. Polymer
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90.09% 、 93.49% 、 96.27% ，即随着含硫 扩链 剂
[7] Lowe A B. Thiol-ene “click” reactions and recent applications in
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热处理前胶膜的拉伸强度越来越接近。这表明，含 2014, 5(17): 4820-4870.
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下的耐热氧降解性能 [18-19] 。且因为 含硫扩链剂 Chemical Society Reviews, 2010, 39(4): 1355-1387.
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（2）引入 ME-HEA 后，对乳液的稳定性几乎没
chain extenders[J]. Progress in Organic Coatings, 2018, 123: 1-9.
有影响；乳液的平均粒径在 40.0~43.8 nm，吸水率 [14] Shi X, Shi H X, Wu H K, et al. A novel fluorinated diamine as an
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学性能得到明显提高。当 w(ME-HEA)=4.3%时，胶 polyurethanes containing long-segment fluorinated chain
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用寿命。 Synthesis and thermodynamics properties of polysulfide-based
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