| 聚乳酸聚氨酯嵌段预聚体增韧聚乳酸/热塑性聚氨酯共混物的研究 |
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| 引用本文： | 朱海彬,朱涛,张卫英,英晓光,李晓. 聚乳酸聚氨酯嵌段预聚体增韧聚乳酸/热塑性聚氨酯共混物的研究[J]. 福州大学学报(自然科学版), 2024, 52(3) |
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| 作者姓名： | 朱海彬 朱涛 张卫英 英晓光 李晓 |
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| 作者单位： | 福州大学石油化工学院,福州大学石油化工学院,福州大学石油化工学院,福州大学石油化工学院,福州大学石油化工学院 |
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| 基金项目： | 国家自然科学基金资助项目（22278084）;福建省自然科学基金资助项目（2020J01514）;福州大学贵重仪器设备开放测试基金资助项目（2023T021） |
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| 摘 要： | 本研究合成了聚乳酸聚氨酯嵌段共聚物预聚体(PLA-b-PUP),以其作为聚乳酸(PLA)和热塑性聚氨酯(TPU)的活性相容剂,通过原位反应增容制备了PLA/TPU/PLA-b-PUP超韧共混物。通过拉伸试验、冲击试验、SEM、FT-IR、DSC和TGA研究了共混物的力学性能、热性能和增韧机理。结果表明,PLA-b-PUP中的异氰酸酯基团与PLA和TPU上的活性基团发生了反应,显著改善了PLA/TPU共混物两相界面的相容性。随着PLA-b-PUP的加入,共混物中PLA的玻璃化转变温度和相对结晶度逐渐降低,当PLA-b-PUP的质量分数为PLA/TPU共混物的4%时,共混材料的断裂伸长率和缺口冲击强度分别达到无相容剂时的8.12倍和2.73倍,表现出良好的增容增韧效果。添加PLA-b-PUP后,共混物的初始分解温度有所降低,但最快分解温度有所提高。
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| 关 键 词： | 聚乳酸 热塑性聚氨酯 聚乳酸聚氨酯嵌段预聚体 相容剂 增韧 |
| 收稿时间： | 2023-02-21 |
| 修稿时间： | 2023-05-17 |
Study on polylactic acid polyurethane block prepolymer toughened polylactic acid/thermoplastic polyurethane blends |
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| ZHU Haibin,ZHU Tao,ZHANG Weiying,Ying Xiaoguang and LI Xiao. Study on polylactic acid polyurethane block prepolymer toughened polylactic acid/thermoplastic polyurethane blends[J]. Journal of Fuzhou University(Natural Science Edition), 2024, 52(3) |
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| Authors: | ZHU Haibin ZHU Tao ZHANG Weiying Ying Xiaoguang LI Xiao |
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| Affiliation: | College of Chemical Engineering, Fuzhou University,College of Chemical Engineering, Fuzhou University,College of Chemical Engineering, Fuzhou University,College of Chemical Engineering, Fuzhou University,College of Chemical Engineering, Fuzhou University |
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| Abstract: | In this study, polylactic polyurethane block prepolymer (PLA-b-PUP) was synthesized and used as the active compatibilizer of polylactic acid (PLA) and thermoplastic polyurethane (TPU). PLA/TPU/PLA-b-PUP supertoughened-blends were prepared by in situ reaction. The mechanical properties, thermal properties and toughening mechanism of the blends were investigated by tensile test, impact test, SEM, FT-IR, DSC and TGA. The results showed that the isocyanate groups in the PLA-b-PUP reacted with the active groups on PLA and TPU, which significantly improved the compatibility of the two-phase interface of PLA/TPU blends. With the addition of PLA-b-PUP, the glass transition temperature and relative crystallinity of PLA in the blend gradually decreased. When the mass fraction of PLA-b-PUP was 4% of that of PLA/TPU blend, the elongation at break and notch impact strength of the blend were 8.12 times and 2.73 times of those without compatilizer, respectively, showing a good capacity and toughening effect. After addition of PLA-b-PUP, the initial decomposition temperature decreased, but the fastest decomposition temperature increased. |
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| Keywords: | polylactic acid thermoplastic polyurethane polylactic polyurethane block prepolymer compatilizer toughening |
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