Thermal and Mechanical Properties of Vinyltrimethoxysilane (VTMOS) Crosslinked High Molecular Weight Polyethylene (HMWPE)

AUTOR(ES)

Rocha, Marisa Cristina Guimarães, Moraes, Lorena Rodrigues da Costa, Cella, Norberto

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

27/07/2017

RESUMO

The use of polyethylene in sliding systems for automotive industry requires adequate mechanical properties, such as high wear resistance, besides good processing properties in conventional extrusion processes. Aiming to fulfill these requirements, crosslinks were introduced in a high molecular weight polyethylene (HMWPE) grade through a process involving grafting of vinyltrimethoxysilane (VTMOS) onto the polymer chain, promoted by dicumyl peroxide (DCP). The results obtained showed that the introduction of crosslinks improved the wear resistance of HMWPE. However, the HMWPE crosslinking led to a significant decrease in the Young’s Modulus, as a result of the reduction in crystallinity or the heterogeneous structure of the crosslinked samples. The tensile strength and the thermal properties were not affected.

Documentos Relacionados

• Improvements of ultra-high molecular weight polyethylene mechanical properties by nitrogen plasma immersion ion implantation
• The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride)
• Role of Cured Epoxy and Block Copolymer Addition in Mechanical and Thermal Properties of Polyethylene
• Mechanical, thermal and morphological properties of glutaraldehyde crosslinked bovine pericardium followed by glutamic acid treatment
• Effect of drying method on mechanical, thermal and water absorption properties of enzymatically crosslinked gelatin hydrogels