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首页> 外文期刊>Journal of Applied Polymer Science >Hierarchical structure and properties of rigid PVC foam crosslinked by the reaction between anhydride and diisocyanate
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Hierarchical structure and properties of rigid PVC foam crosslinked by the reaction between anhydride and diisocyanate

机译：酸酐与二异氰酸酯反应交联刚性PVC泡沫的层次结构和性质

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摘要

Rigid crosslinked poly(vinyl chloride) (c-PVC) foams by forming semi-interpenetrating network (SIPN) structure via the reaction of phthalic anhydride (PA) and diisocyanate were prepared. The influence of PA on hierarchical structure and mechanical properties of c-PVC foam was studied. The Fourier transform infrared spectrometer results showed that the presence of PA resulted in the formation of imide structure in the SIPN of obtained c-PVC foams, which introduced a structural defect of SIPN. Thus, the residue (gel) from tetrahydrofuran extraction of the foams decreased with the increase of PA content. Dynamic thermal analysis showed the presence of three aggregation state structures in the c-PVC foams, depending on the loading of PA. The addition of PA in the formulations affected cellular structure and mechanical properties of the obtained foams. Furthermore, the influence of chemical environment of anhydride compounds on the formation of imide structure in the crosslinking network of c-PVC foams was discussed. A strategy for reducing defect of crosslinking network and improving mechanical properties was put forward. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46141.
机译：制备通过形成半渗透网络（SiPN）结构的刚性交联聚（氯乙烯）（C-PVC）泡沫，制备邻苯二甲酸酐（PA）和二异氰酸酯的反应。研究了PA对C-PVC泡沫的层次结构和力学性能的影响。傅里叶变换红外光谱仪结果表明，PA的存在导致在获得的C-PVC泡沫的SIPN中形成酰亚胺结构，其引入了SiPN的结构缺陷。因此，随着PA含量的增加，来自四氢呋喃萃取的残余物（凝胶）降低。动态热分析显示C-PVC泡沫中存在三种聚集状态结构，这取决于PA的负载。在制剂中添加PA受影响的泡沫的细胞结构和机械性能。此外，讨论了酸酐化合物对C-PVC泡沫交联网络中酰亚胺结构对酰亚胺结构形成的影响。提出了一种减少交联网络缺陷和改善机械性能的策略。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46141。

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