Study on the lubrication behavior of low molecular weight poly(vinyl chloride‐co‐n‐butyl acrylate‐co‐vinyl acetate) ternary copolymer in rigid PVC

Author:

Song Changtong1,Shu Hongyi1,Zhang Xianhong1ORCID,Ma Yuhong12,Chen Dong1,Yang Wantai12

Affiliation:

1. State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing China

2. Key Laboratory of Carbon Fiber and Functional Polymers of the Ministry of Education, College of Materials Science and Engineering Beijing University of Chemical Technology Beijing China

Abstract

AbstractHerein, low molecular weight poly(vinyl chloride‐co‐n‐butyl acrylate‐co‐vinyl acetate) (PCBV) ternary copolymers with varied copolymer composition was employed as a novel polymeric lubricant in rigid PVC. The lubrication effect of PCBVs on the melting process and mechanical properties of the final PVC products were fully investigated. The results indicated that PCBV can serve either as an internal or as an external lubricant depending on its composition. PCBV‐45.5 terpolymer (PBA% ~ 45.5%) exhibits outstanding balance both internal and external lubricating roles. SEM‐EDS results show that addition PCBV‐45.5 form a film on the surface of PVC grains as similar as that adding both internal and external lubricants. Fusion characteristics and DMTA demonstrate that PCBV‐45.5 prolongs the fusion time (26% extension, 1.5 phr) and reduces the glass transition temperature (4.0 °C, 1.5 phr). Finally, the mechanical properties of rigid PVC have been greatly improved by using 1.5 phr PCBV‐45.5. In detail, the tensile strength increased from 54 to 59 MPa and the elongation at break increased from 10% to 30%, respectively. Meanwhile, the impact strength of PVC/PCBV‐45.5 is 3.6 times that of the blend without addition. The excellent performance of PCBV exhibited great potential as a polymeric lubricant candidate in rigid PVC composites.

Funder

Fundamental Research Funds for the Central Universities

National Natural Science Foundation of China

Publisher

Wiley

Subject

Materials Chemistry,Polymers and Plastics,Physical and Theoretical Chemistry

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