Preparation and Performance Analysis of Composite HVAC Crosslinked Polyethylene Composites

LAI Li-qiong, LIU Chao-jing, HUANG Guo-xiang

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (11) : 77-80. DOI: 10.15925/j.cnki.issn1005-3360.2024.11.015
Processing and Application

Preparation and Performance Analysis of Composite HVAC Crosslinked Polyethylene Composites

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Abstract

In order to improve the mechanical properties and thermal stability of crosslinked polyethylene (PEX), modified montmorillonite/PEX composites were prepared using polyethylene as matrix and silane coupling agent (vinyltrimethoxysilane) modified montmorillonite as filler, and the effect of different modified montmorillonite dosages on the mechanical and thermal properties of the PEX composites were investigated. The results showed that the moderate doping of 1.0% mass fraction modified montmorillonite effectively enhanced the tensile strength, flexural strength and simple beam impact strength of PEX composites, and improved the thermal stability of PEX composites. Under this doping condition, the tensile strength, flexural strength and simply supported beam impact strength of PEX composites were 16.21 MPa, 21.96 MPa and 10.31 kJ/m2, respectively, the electric field breakdown strength reached the maximum of 32.21 kV/mm, and the Vicat softening temperature was 120.91 ℃. Therefore, the appropriate amount of modified montmorillonite can effectively improve the mechanical properties and thermal stability of PEX composites.

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Crosslinked polyethylene / Montmorillonite / Coupling agent

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LAI Li-qiong , LIU Chao-jing , HUANG Guo-xiang. Preparation and Performance Analysis of Composite HVAC Crosslinked Polyethylene Composites. Plastics Science and Technology. 2024, 52(11): 77-80 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.11.015

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