Preparation of Calcium Carbonate With Different Morphology and Its Effect on Mechanical Properties of PVC Film

doi:10.19491/j.issn.1001-9278.2020.12.006

Abstract

Abstract:

Taking ammonium metavanadate， polyethylene glycerin， cetyltrimethylammonium bromide， sodium pyrophosphate decahydrate and polyvinylpyrrolidone as shape control agents， five kinds of calcium carbonate particles with different shapes including flake， diamond， rod， ball and cube were prepared by a carbonation method using calcium chloride and sodium carbonate as raw materials. The effect of the morphology of calcium carbonate particles on the mechanical properties of soft PVC films was investigated. The results indicated that the mechanical properties of the films were improved with the addition of calcium carbonate at different morphologies， and their tensile strength and elongation at break increased significantly. The calcium carbonate with a rod morphology led to optimum mechanical performance for the PVC films， and the films achieved the tensile strength of 27.11 MPa. The films obtained a maximum value of 98.23 % in elongation at break in the presence of calcium carbonate with a diamond shape.

Key words: poly（vinyl chloride）, calcium carbonate, film, mechanical property, shape

CLC Number:

TQ325.3

DONG Dongdong, WANG Gang∗, SU Xiaofeng, WANG Chong, ZHANG Nan. Preparation of Calcium Carbonate With Different Morphology and Its Effect on Mechanical Properties of PVC Film[J]. China Plastics, 2020, 34(12): 35-40.

Figures/Tables 6

Fig.1. SEM of calcium carbonate particles with different shapes

Fig.2. XRD of calcium carbonate particles with different shapes

Fig.3. TG of calcium carbonate particles with different shape

形貌改性剂类型	比表面积/m²·g^-1
偏钒酸铵	1.850 2
聚乙二醇	0.918 6
十六烷基三甲基溴化铵	0.243 7
焦磷酸钠十水	19.121 1
聚乙烯吡咯烷酮	1.204 4
纯碳酸钙	0.533 4

Tab.1. BET of calcium carbonate particles with different shape

Fig.4. Mechanical properties of PVC/calcium carbonate composite films with different morphologies

Fig.5. SEM of PVC/calcium carbonate particles with different shape

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