Feasibility Study on Preparation of HDPE Composites Filled with Dolomite Instead of Traditional Marble Calcium Carbonate

LIAO Jing-jing, LIU Wan-yu, LIU Zhong-lin, LI Yan-ming

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (11) : 1-6. DOI: 10.15925/j.cnki.issn1005-3360.2024.11.001
Theory and Research

Feasibility Study on Preparation of HDPE Composites Filled with Dolomite Instead of Traditional Marble Calcium Carbonate

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Abstract

To study the feasibility of dolomite replacing traditional marble calcium carbonate in the preparation of composites, the composition, surface and particle size of dolomite and marble were determined, and the mechanical properties of high-density polyethylene (HDPE) filled with two powders were compared. The results showed that the dolomite powder had smaller particle size, narrower particle size distribution and more regular particle shape than marble powder under the same crushing conditions. The impact strength of dolomite/HDPE composites (18.12 kJ/m2) was higher than that of marble/HDPF composites (8.60 kJ/m2). The modification effects of different modifiers on dolomite and the mechanical properties of modified dolomite/HDPE composites were investigated by FTIR, SEM and universal mechanical testing machine. The results showed that the compatibility between dolomite and HDPE matrix was improved when the stearic acid and coupling agent were used, and the impact strength, flexural strength and tensile strength of the composites increased by 71.08%, 7.40% and 6.43%, respectively, compared with the unmodified dolomite composites.

Key words

Dolomite / Marble / Plastic / Surface modification / Mechanical properties

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LIAO Jing-jing , LIU Wan-yu , LIU Zhong-lin , et al. Feasibility Study on Preparation of HDPE Composites Filled with Dolomite Instead of Traditional Marble Calcium Carbonate. Plastics Science and Technology. 2024, 52(11): 1-6 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.11.001

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