Zhang Qing, Huang Jin, Zhou Na
State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Soft-Matter Material Chemistry, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
Materials (Basel). 2023 Sep 18;16(18):6256. doi: 10.3390/ma16186256.
In this study, polyol castor oil (CO) and toluene-2,4-diisocyanate (TDI) were selected to modify PBAT, and castor-oil-based polyurethane (COP) was produced in a PBAT matrix using melt-blending and hot-pressing technology to study the effect of network cross-linking structure on various properties of bio-based polyester PBAT, aiming to introduce CO and TDI to improve the mechanical properties of composite materials. The results showed that when the total addition of CO and TDI was 15%, and the ratio of the hydroxyl group of CO to the isocyanate group of TDI was 1:1, the mechanical properties were the best. The tensile strength of the composite was 86.19% higher than that of pure PBAT, the elongation at break was 70.09% higher than that of PBAT, and the glass transition temperature was 7.82 °C higher than that of pure PBAT. Therefore, the composite modification of PBAT by CO and TDI can effectively improve the heat resistance and mechanical properties of PBAT-based composites.
在本研究中，选择多元醇蓖麻油（CO）和甲苯-2,4-二异氰酸酯（TDI）对聚己二酸/对苯二甲酸丁二醇酯（PBAT）进行改性，并采用熔融共混和热压技术在PBAT基体中制备蓖麻油基聚氨酯（COP），以研究网络交联结构对生物基聚酯PBAT各种性能的影响，旨在引入CO和TDI来提高复合材料的力学性能。结果表明，当CO和TDI的总添加量为15%，且CO的羟基与TDI的异氰酸酯基团的比例为1:1时，力学性能最佳。复合材料的拉伸强度比纯PBAT高86.19%，断裂伸长率比PBAT高70.09%，玻璃化转变温度比纯PBAT高7.82℃。因此，CO和TDI对PBAT进行复合改性可有效提高PBAT基复合材料的耐热性和力学性能。
