Effect of Vinyl Chloride Copolymer Elastomer on Modification and Properties of PVC

doi:10.19491/j.issn.1001-9278.2020.09.003

Abstract

Abstract:

A vinly chloride-butyl acrylate-methly methacrylate copolymer elastomer (VCE) was used to modify PVC resin for improvement of impact resistance, and a comparative investigation was also carried out for the modification effect on PVC with MBS, ACR and CPE. The rheological, mechanical and thermal deformation properties of the modified PVC resins were investigated, and their cross-sectional morphologies were observed. In the view of the comparative results, the modified PVC resins presented a decrease in tensile strength and bending strength but an increase in impact strength and elongation at break increased. Moreover, their thermal deformation temperature decreased with an increase of VCE content. VCE was found to have better modification effect than ACR and CPE but a similar effect with MBS. VCE shows a significant toughening effect on PVC, and therefore it can be taken as a promising impact modifier for PVC.

Key words: polyvinyl chloride, vinyl chloride copolymer elastomer, impact modifier, rheological property

CLC Number:

TQ325.3

YANG Kang, ZENG Huayu, ZHONG Anlan, YUAN Huilin, ZENG Shu, MA Yulong. Effect of Vinyl Chloride Copolymer Elastomer on Modification and Properties of PVC[J]. China Plastics, 2020, 34(9): 16-21.

Figures/Tables 9

原料名称	含量/份
PVC	100
复合热稳定剂	4
碳酸钙	25
改性剂	0、2、4、6、8、10
其他助剂	适量

Tab.1. Formulations of different modifiers

Fig.1. Structure diagram of VCE

Fig.2. FTIR spectra of PVC and VCE

Fig.3. Apparent morphology of VCE

Fig.4. Rheological curves of PVC modified by different modifiers

改性剂类型	塑化时间/s	平衡扭矩/N·m
无	102	12.5
CPE	92	12.5
ACR	86	12.8
MBS	88	13.2
VCE	66	7.2

Tab.2. Rheological data comparison

Fig.5. Influence of different modifiers on the mechanical properties of PVC

Fig.6. Influence of different modifiers on the thermal deformation temperature of PVC

Fig.7. SEM of images sections of PVC modified by different modifiers

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