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中国塑料 ›› 2024, Vol. 38 ›› Issue (4): 19-25.DOI: 10.19491/j.issn.1001-9278.2024.04.004
沈丹彤1, 薛雨亭1, 李荣杰2, 徐芳1(), 翁云宣1(
)
收稿日期:
2023-09-05
出版日期:
2024-04-26
发布日期:
2024-04-22
通讯作者:
徐芳(1991—),女,副研究员,从事可降解高分子材料等研究工作,xufang@btbu.edu.cn基金资助:
SHEN Dantong1, XUE Yuting1, LI Rongjie2, XU Fang1(), WENG Yunxuan1(
)
Received:
2023-09-05
Online:
2024-04-26
Published:
2024-04-22
Contact:
XU Fang, WENG Yunxuan
E-mail:xufang@btbu.edu.cn;wyxuan@th.btbu.edu.cn
摘要:
以聚乳酸二元醇(PLA⁃OH)和六亚甲基二异氰酸酯(HDI)为原料,2,2⁃二羟甲基丁酸(DMBA)为亲水扩链剂合成了亲水扩链剂含量不同的聚乳酸(PLA)基水性聚氨酯(PLA⁃WPU)乳液,制备了PLA⁃WPU胶膜和超细纤维合成革。结果表明,随DMBA含量的增加,PLA⁃WPU乳液粒径减小、固含量增大,PLA⁃WPU超细纤维合成革拉伸强度和最大负荷增大,水接触角减小。当DMBA含量为5.5 %时,PLA⁃WPU乳液固含量达到35.4 %,粒径为196.37 nm,PLA⁃WPU超细纤维合成革的拉伸强度提高到29.9 MPa,约为超细纤维基布的1.7倍,水接触角降低到73 °。
中图分类号:
沈丹彤, 薛雨亭, 李荣杰, 徐芳, 翁云宣. 聚乳酸基水性聚氨酯的制备及其在合成革中的应用研究[J]. 中国塑料, 2024, 38(4): 19-25.
SHEN Dantong, XUE Yuting, LI Rongjie, XU Fang, WENG Yunxuan. Study on preparation of poly(lactic acid)⁃based waterborne polyurethane and its application in synthetic leathers[J]. China Plastics, 2024, 38(4): 19-25.
样品编号 | DMBA 含量/% | 乳液外观 | 离心现象 | 贮存 稳定性 |
---|---|---|---|---|
4.5PLA⁃WPU | 4.5 | 乳白色 | 无沉淀 | 稳定 |
5PLA⁃WPU | 5.0 | 乳白色半清透 | 无沉淀 | 稳定 |
5.5PLA⁃WPU | 5.5 | 泛蓝紫光,清透 | 无沉淀 | 稳定 |
样品编号 | DMBA 含量/% | 乳液外观 | 离心现象 | 贮存 稳定性 |
---|---|---|---|---|
4.5PLA⁃WPU | 4.5 | 乳白色 | 无沉淀 | 稳定 |
5PLA⁃WPU | 5.0 | 乳白色半清透 | 无沉淀 | 稳定 |
5.5PLA⁃WPU | 5.5 | 泛蓝紫光,清透 | 无沉淀 | 稳定 |
样品 | T5 %/℃ | Tmax/℃ | Vmax/%/℃ | CY600/% |
---|---|---|---|---|
PLA⁃OH | 209.1 | 253.6 | 4.12 | 0.19 |
4.5PLA⁃WPU | 200.1 | 271.4 | 3.75 | 4.13 |
5PLA⁃WPU | 192.3 | 274.5 | 4.14 | 0.62 |
5.5PLA⁃WPU | 174.7 | 275.8 | 3.89 | 0.39 |
样品 | T5 %/℃ | Tmax/℃ | Vmax/%/℃ | CY600/% |
---|---|---|---|---|
PLA⁃OH | 209.1 | 253.6 | 4.12 | 0.19 |
4.5PLA⁃WPU | 200.1 | 271.4 | 3.75 | 4.13 |
5PLA⁃WPU | 192.3 | 274.5 | 4.14 | 0.62 |
5.5PLA⁃WPU | 174.7 | 275.8 | 3.89 | 0.39 |
样品 | 拉伸强度/MPa | 最大负荷/N |
---|---|---|
超细纤维基布 | 17.6 | 67.68 |
4.5PLA⁃WPU | 22.1 | 98.97 |
5PLA⁃WPU | 26.9 | 105.56 |
5.5PLA⁃WPU | 29.9 | 119.42 |
样品 | 拉伸强度/MPa | 最大负荷/N |
---|---|---|
超细纤维基布 | 17.6 | 67.68 |
4.5PLA⁃WPU | 22.1 | 98.97 |
5PLA⁃WPU | 26.9 | 105.56 |
5.5PLA⁃WPU | 29.9 | 119.42 |
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