Effects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites

High-density polyethylene (HDPE)/carbon black (CB) is widely used in positive temperature coefficient (PTC) composites. In order to expand its applications to fields that need good flexibility, polyolefin elastomer (POE) was incorporated into HDPE/CB composites as a secondary thermoplastic elastomer...

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Autores principales:	Feng Xue, Kangcai Li, Lei Cai, Enyong Ding
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/7f82cad75f9940a6bb3914fb32a3aa33
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spelling	oai:doaj.org-article:7f82cad75f9940a6bb3914fb32a3aa332021-11-22T01:10:58ZEffects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites1098-232910.1155/2021/1124981https://doaj.org/article/7f82cad75f9940a6bb3914fb32a3aa332021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/1124981https://doaj.org/toc/1098-2329High-density polyethylene (HDPE)/carbon black (CB) is widely used in positive temperature coefficient (PTC) composites. In order to expand its applications to fields that need good flexibility, polyolefin elastomer (POE) was incorporated into HDPE/CB composites as a secondary thermoplastic elastomer phase to provide flexibility. The effects of POE and CB content on the PTC performance and flexibility were investigated. Micro morphology and crystallization behavior are closely related to PTC properties. SEM was conducted to reveal phase morphology and filler dispersion, and DSC was conducted to research crystallization behavior. The results show that the incorporation of 18 wt.% POE can decrease the percolation threshold of conductive carbon black from 22.5 wt.% to 16 wt.%. When the CB content is 30 wt.%, the room temperature resistivity gradually increases with the increasing content of POE because of the barrier effect of POE phase, and the PTC intensity is gradually enhanced. Meanwhile, the PTC switching temperature shifts down to a lower temperature. The incorporation of 18 wt.% POE significantly increases the elongation at break, reaching an ultrahigh value of 980 wt.%, which means great flexibility has been achieved in HDPE/POE/CB composites. This work provides a new method of fabricating PTC composites with balanced electrical and mechanical properties.Feng XueKangcai LiLei CaiEnyong DingHindawi-WileyarticlePolymers and polymer manufactureTP1080-1185ENAdvances in Polymer Technology, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Polymers and polymer manufacture TP1080-1185
spellingShingle	Polymers and polymer manufacture TP1080-1185 Feng Xue Kangcai Li Lei Cai Enyong Ding Effects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites
description	High-density polyethylene (HDPE)/carbon black (CB) is widely used in positive temperature coefficient (PTC) composites. In order to expand its applications to fields that need good flexibility, polyolefin elastomer (POE) was incorporated into HDPE/CB composites as a secondary thermoplastic elastomer phase to provide flexibility. The effects of POE and CB content on the PTC performance and flexibility were investigated. Micro morphology and crystallization behavior are closely related to PTC properties. SEM was conducted to reveal phase morphology and filler dispersion, and DSC was conducted to research crystallization behavior. The results show that the incorporation of 18 wt.% POE can decrease the percolation threshold of conductive carbon black from 22.5 wt.% to 16 wt.%. When the CB content is 30 wt.%, the room temperature resistivity gradually increases with the increasing content of POE because of the barrier effect of POE phase, and the PTC intensity is gradually enhanced. Meanwhile, the PTC switching temperature shifts down to a lower temperature. The incorporation of 18 wt.% POE significantly increases the elongation at break, reaching an ultrahigh value of 980 wt.%, which means great flexibility has been achieved in HDPE/POE/CB composites. This work provides a new method of fabricating PTC composites with balanced electrical and mechanical properties.
format	article
author	Feng Xue Kangcai Li Lei Cai Enyong Ding
author_facet	Feng Xue Kangcai Li Lei Cai Enyong Ding
author_sort	Feng Xue
title	Effects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites
title_short	Effects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites
title_full	Effects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites
title_fullStr	Effects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites
title_full_unstemmed	Effects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites
title_sort	effects of poe and carbon black on the ptc performance and flexibility of high-density polyethylene composites
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/7f82cad75f9940a6bb3914fb32a3aa33
work_keys_str_mv	AT fengxue effectsofpoeandcarbonblackontheptcperformanceandflexibilityofhighdensitypolyethylenecomposites AT kangcaili effectsofpoeandcarbonblackontheptcperformanceandflexibilityofhighdensitypolyethylenecomposites AT leicai effectsofpoeandcarbonblackontheptcperformanceandflexibilityofhighdensitypolyethylenecomposites AT enyongding effectsofpoeandcarbonblackontheptcperformanceandflexibilityofhighdensitypolyethylenecomposites
_version_	1718418348602032128

Effects of POE and Carbon Black on the PTC Performance and Flexibility of High-Density Polyethylene Composites

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