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首页> 外文期刊>Journal of Applied Polymer Science >Properties of waterborne polyurethane-fluorinated marine coatings: The effect of different types of diisocyanates and tetrafluorobutanediol chain extender content
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Properties of waterborne polyurethane-fluorinated marine coatings: The effect of different types of diisocyanates and tetrafluorobutanediol chain extender content

机译：水性聚氨酯氟化船用涂料的性能：不同类型的二异氰酸酯和四氟丁二醇增链剂含量的影响

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摘要

Three series of waterborne polyurethane- (WBPU) fluorinated coatings were prepared with single aliphatic (4,4′-dicyclohexylmethane diisocyanate, H_(12)MDI), aromatic (4,4′-diphenylmethane, MDI) and a mixture of aliphatic and aromatic diisocyanates (1: 1). Different contents of 2,2,3,3-tetrafluoro1,4-butanediol (TFBD) as a chain extender were used in the WBPU coatings. The fluoro-enriched surface of the WBPU coatings was obtained with a combination of a high TFBD content (8.77 mol %) as well as the aliphatic or mixed diisocyanates. The tensile strength, Young's modulus, elongation at break (%) and adhesive strength were characterized with respect to the TFBD contents. The mechanical strength and adhesive strength increased with increasing TFBD content in the three series. In artificial salt water, the maximum adhesive strength of WBPU was observed for this coating, which was achieved by TFBD bonded H_(12)MDI of mixed diisocyanates with a higher TFBD content (8.77 mol %).
机译：用单脂族（4,4'-二环己基甲烷二异氰酸酯，H_（12）MDI），芳族（4,4'-二苯甲烷，MDI）以及脂族和芳族的混合物制备三系列水性聚氨酯-（WBPU）氟化涂料二异氰酸酯（1：1）。 WBPU涂料中使用了不同含量的2,2,3,3-四氟1,4-丁二醇（TFBD）作为扩链剂。通过高TFBD含量（8.77 mol％）以及脂肪族或混合的二异氰酸酯的组合获得WBPU涂层的富氟表面。相对于TFBD含量，表征了拉伸强度，杨氏模量，断裂伸长率（％）和粘合强度。在三个系列中，机械强度和粘合强度随TFBD含量的增加而增加。在人造盐水中，观察到该涂层的WBPU的最大粘合强度，这是通过TFBD含量较高（8.77 mol％）的混合二异氰酸酯的TFBD键合H_（12）MDI实现的。

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