硅酸钙表面有机改性和形貌对填充PP复合材料力学性能的影响及机理

doi:10.11896/cldb.21080298

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Abstract Hydroxy silicone oil was used to achieve the dry surface modification of calcium silicate. And the effect of surface modification on the activation index and oil absorption of calcium silicate were studied. Fourier transform infrared absorption spectrometer (FTIR) and thermogravimetric analyzer (TG) were used to characterize the modification mechanism of calcium silicate. The results showed that the modification effect of cal-cium silicate by 2% hydroxy silicone oil is very good. The activation index is close to 100%, and the oil absorption value is reduced by more than 50%. The FTIR spectra of modified calcium silicate produce the same C-H absorption peaks as hydroxy silicone oil at 795 cm^-1, 1 258 cm^-1 and 2 955 cm^-1, indicating that the modifier successfully coated the calcium silicate surface. Then the modified calcium silicate was filled into polypropylene (PP) to prepare composite materials. Besides, the effect of the filling amount and morphology on the mechanical properties of the composites were studied. The results showed that the mechanical properties of the modified calcium silicate/PP composites are better than those of unmodified calcium silicate/PP composites. Through comparison, it is found that the compatibility of flaky calcium silicate and PP is better, and the mechanical properties of the composite material are better at higher filling amount.

Key words： calcium silicate dry surface modification polypropylene mechanical property mechanism

Published: Online: 2022-12-09

CLC number:

TD985

Fund:Guangxi Science & Technology Major Project (AA18242008) and Opening Project of Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization (HZXYKFKT201904).

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	Articles by authors
	LIANG Chao
	LI Ruchun
	LI Chunquan
	SUN Zhiming
	CHEN Zhenming
	ZHENG Shuilin

Cite this article:

LIANG Chao,LI Ruchun,LI Chunquan, et al. Effect of Surface Organic Modification and Morphology of Calcium Silicate on the Properties of PP Composites and Its Mechanism[J]. Materials Reports, 2022, 36(23): 21080298-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21080298 OR http://www.mater-rep.com/EN/Y2022/V36/I23/21080298

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