The effects of ACR/MAH ionic cross-linking on the cell morphology, mechanical properties, and dimensional stability of PVC foams

IF 6.3 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2024-08-12 DOI:10.1016/j.polymdegradstab.2024.110946

Jingze Guo , Yutong Li , Shikai Song, Shuangmei Tan, Shuai Zhao, Lin Li, Hui Wang

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Abstract

This study details a novel approach to enhance the dimensional stability of foamed polyvinyl chloride (PVC) materials through the introduction of a reversible cross-linking network. This is achieved via the carboxylation of acrylate polymers (ACR) utilizing the hydrolysis reaction of maleic anhydride (MAH) during the extrusion of PVC foam sheets. Subsequently, an ionic cross-linking network is formed using calcium-zinc (Ca-Zn) stabilizers. This paper elucidates the process of cell formation and the mechanisms underpinning the ACR/MAH ion network formation. Cell morphology of the foamed PVC was characterized using SEM, and the effects of ionic cross-linking on the plasticizing time, dimensional stability, and mechanical properties were analyzed through cell diameter distribution measurements and rheometry. The longitudinal and transverse dimensional shrinkage of PVC-F/MAH1 was reduced by 28.0 % and 28.9 %, respectively. The construction of the ACR/MAH ion cross-linking network not only augments the mechanical properties but also substantially enhances the dimensional stability of the material. This approach underscores the viability of ion cross-linking networks in advancing the performance parameters of PVC foams, suggesting a promising avenue for future research and development in polymer processing technology, and potentially expanding their application spectrum.

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ACR/MAH 离子交联对聚氯乙烯泡沫的细胞形态、机械性能和尺寸稳定性的影响

本研究详细介绍了一种通过引入可逆交联网络来提高发泡聚氯乙烯（PVC）材料尺寸稳定性的新方法。在挤压聚氯乙烯泡沫板的过程中，利用马来酸酐（MAH）的水解反应对丙烯酸酯聚合物（ACR）进行羧化，从而实现这一目的。随后，利用钙锌（Ca-Zn）稳定剂形成离子交联网络。本文阐明了ACR/MAH离子网络的形成过程和机理。利用扫描电镜对发泡聚氯乙烯的细胞形态进行了表征，并通过细胞直径分布测量和流变仪分析了离子交联对塑化时间、尺寸稳定性和机械性能的影响。PVC-F/MAH1 的纵向和横向尺寸收缩率分别降低了 28.0% 和 28.9%。ACR/MAH 离子交联网络的构建不仅增强了材料的机械性能，还大大提高了材料的尺寸稳定性。这种方法强调了离子交联网络在提高聚氯乙烯泡沫性能参数方面的可行性，为聚合物加工技术的未来研究和开发提供了一个前景广阔的途径，并有可能扩大其应用范围。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.