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何 等:蓖麻油-异山 醇基水性光固化聚氨酯的合成及性能研究
长>370 nm时透光率均能维持在90%以上。推测异山 2. 7 乳液及其对应涂膜的基本性能分析
醇上2个稠合的四氢呋喃环状结构对紫外光区间存 表 3 为水性光固化生物基聚氨酯乳液及其涂膜
在紫外光的吸收,使得紫外区间的透光率明显下降。 的基本性能。
表3 WPU乳液及 对应涂膜的基本性能
Table 3 Basic properties of WPU emulsions and coatings
项目 WPU-0 WPU-1 WPU-2 WPU-3 WPU-4
乳液外观 白色 微白泛蓝光 透明泛蓝光 透明泛蓝光 透明泛蓝光
乳液稳定性 无沉淀 无沉淀 无沉淀 无沉淀 无沉淀
铅笔硬度 HB 2H 3H 4H 5H
附着力/级 0 0 0 1 1
由表 3 可知,乳液外观与乳液粒径测试结果相一 room-temperature self-healability and reprocessability
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经稳定性测试后均能保持稳定无沉淀。涂膜的铅笔
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硬度与力学性能分析结果相一致,随着异山 醇含
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收稿日期 2024-04-22(修改稿)
super-tough "living" supramolecular polymers with fast
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