Thermal, mechanical, and rheological properties of poly(propylene carbonate) cross-linked with polyaryl polymethylene isocyanate
Thermal, mechanical, and rheological properties of poly(propylene carbonate) cross-linked with polyaryl polymethylene isocyanate
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DOI：
10.1007/s00289-013-0912-5
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发表时间：
2013-01
期刊：
影响因子：
3.2
通讯作者：
Yan-ping Hao;Huanhuan Ge;Lijing Han;Hongyu Liang;Huiliang Zhang;Li-song Dong
中科院分区：
文献类型：
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作者：
Yan-ping Hao;Huanhuan Ge;Lijing Han;Hongyu Liang;Huiliang Zhang;Li-song Dong
本研究以聚芳基聚亚甲基异氰酸酯（PAPI）为交联剂，制备了交联聚碳酸丙烯酯（PPC）。研究了交联PPC的凝胶含量、热行为、力学和流变性能。FTIR结果表明PPC与PAPI之间发生了化学反应，相互作用表明PPC可能与PAPI交联。凝胶含量结果显示，PPC与PAPI部分交联。交联PPC的玻璃化转变温度和分解温度均高于纯PPC。随着PAPI含量的增加，熔体流动指数逐渐降低，复合粘度逐渐增大。此外，拉伸试验也证明了该材料的力学性能得到了提高。少量交联基团的引入，为提高PPC的性能和扩大其应用领域提供了一种高效、便捷的方法。
In this study, cross-linked poly(propylene carbonate) (PPC) was prepared using polyaryl polymethylene isocyanate (PAPI) as a cross-linking agent. The gel content, thermal behaviors, mechanical and rheological properties of the cross-linked PPC were investigated. FTIR results showed that the chemical reactions took place between PPC and PAPI and the interactions demonstrated that PPC may be cross-linked with the PAPI. The results of gel content revealed that PPC was partially cross-linked with the PAPI. The cross-linked PPC showed higher glass transition temperature and decomposition temperature compared with pure PPC. Accordingly, the melt flow index gradually decreased and complex viscosity increased with increasing PAPI content. Moreover, the mechanical properties proved also to be enhanced as evidenced by tensile tests. The introduction of small amount of cross-linkable moiety provides an efficient and convenient method to improve the properties of PPC and extend its application area.