Open Access

ARTICLE

The Promoting Effect of Multifunctional Groups on the Thermal and Mechanical Properties of PVC Materials

by Mei Wang^1,*, Xinzhu Fan¹, Xianghai Song², Quan Bu^1,*

1 School of Agricultural Engineering, Jiangsu University, Zhenjiang, 212013, China
2 Institute of the Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China

* Corresponding Authors: Mei Wang. Email: ; Quan Bu. Email:

(This article belongs to the Special Issue: Renewable Biomass as a Platform for Preparing Green Chemistry)

Journal of Renewable Materials 2023, 11(2), 867-880. https://doi.org/10.32604/jrm.2022.022996

Received 04 April 2022; Accepted 06 June 2022; Issue published 22 September 2022

Abstract

The development of PVC materials grafted with mannich base originated from myrcene (P-MAM-g, where the mannich base derived from myrcene is abbreviated as MAM) via green and effective synthetic methods is a good strategy to avoid unacceptable discoloration and deterioration of thermal and mechanical properties caused by autocatalytic dehydrochlorination (DHC) during PVC processing. In this study, MAM with double bonds, amino groups, ester groups, and phospholipid groups was introduced into the chains of PVC to improve the thermal stability of PVC. The experimental results showed that the covalent attachment of MAM to PVC enhanced both the initial and the long-term stability of PVC. The enhanced performance of P-MAM-g compared with unmodified PVC is attributed to the simultaneous introduction of double bonds and amino groups into the PVC structure. The double bonds trapped the unstable chlorine atoms originated from the degradation of the PVC chain and reacted with the labile macromolecular radicals originated from PVC, thus inhibiting the radical degradation of the PVC chain. Furthermore, the amino groups absorbed the HCl produced in the degradation of PVC, inhibiting the adverse effects of HCl. P-MAM-g displayed better intrinsic flexibility and anti-migration ability of organic functional components compared with the control PVC materials. A possible stabilizing mechanism of the P-MAM-g was also presented.

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Keywords

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