Study on properties of recycled polypropylene for automobile bumpers

doi:10.19491/j.issn.1001-9278.2022.12.017

Abstract

Abstract:

To verify the utilization feasibility of the recycled polypropylene （RPP） in automobile bumper， the effects of contents of post⁃consumer recycled polypropylene （PCR⁃PP） on the impact resistance and tensile， bending， and compression properties of RPP were investigated. The thermal properties and tensile fracture morphology of RPP were also analyzed. The results indicated that the mechanical properties of the RPP exhibited a slow downward trend with an increase in the content of PCR⁃PP from 0 to 50 wt %. The elongation at break decreased significantly from 467 % to 210 %. At， the RPP only presented a slight change in impact resistance and tensile and bending properties at a PCR⁃PP content of 10 wt %， which can meet the requirements of performance for bumper materials.

Key words: bumper, recycled material, polypropylene, mechanical property

CLC Number:

TQ 322.2

DONG Jinghan, ZHAO Yiquan, ZHANG Tongzhu, WANG Yanmeng, DIAO Shuai, LI Minghe, XU Changzhu. Study on properties of recycled polypropylene for automobile bumpers[J]. China Plastics, 2022, 36(12): 121-126.

Figures/Tables 9

References 9

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技术指标	国内						国外
技术指标	对引进车型的要求	扬子公司	中科院化学所	长春应化所	清华大学	北京化工研究院	Amoco公司3243	NS Himont SP1041	蒙特爱迪生公司SP150G81⁃00990	三菱油化	三井Noblen BP⁃BM
拉伸强度/MPa	≥16	16~20	16.5~19	18~28	15~33	19	25.4	17	16	15~33	18
伸长率/%	400	200~500	>500	500~800	200~760	>360	>200	>400	500	200~760	>500
弯曲强度/MPa	-	-	22	17~21	19~24	-	-	20.5	22	19~24	23
弹性模量/MPa	800	600~900	-	-	-	935.2	-	500	-	-	-
缺口冲击强度（23 ℃）/J·m^-1	≥600	400~650	600~750	490~784	-	720	587.4	100	-	490	-
缺口冲击强度（-30 ℃）/J·m^-1	-	-	90~120	≥98	-	-	-	-	95	44~98	不破坏

技术指标	国内						国外
技术指标	对引进车型的要求	扬子公司	中科院化学所	长春应化所	清华大学	北京化工研究院	Amoco公司3243	NS Himont SP1041	蒙特爱迪生公司SP150G81⁃00990	三菱油化	三井Noblen BP⁃BM
拉伸强度/MPa	≥16	16~20	16.5~19	18~28	15~33	19	25.4	17	16	15~33	18
伸长率/%	400	200~500	>500	500~800	200~760	>360	>200	>400	500	200~760	>500
弯曲强度/MPa	-	-	22	17~21	19~24	-	-	20.5	22	19~24	23
弹性模量/MPa	800	600~900	-	-	-	935.2	-	500	-	-	-
缺口冲击强度（23 ℃）/J·m^-1	≥600	400~650	600~750	490~784	-	720	587.4	100	-	490	-
缺口冲击强度（-30 ℃）/J·m^-1	-	-	90~120	≥98	-	-	-	-	95	44~98	不破坏

样品名称	密度/g·cm^-3	灰分/%
RPP⁃HI 0%	1.032	19.9
RPP⁃HI 10%	1.035	20.2
RPP⁃HI 30%	1.040	20.6
RPP⁃HI 50%	1.042	20.8

样品名称	密度/g·cm^-3	灰分/%
RPP⁃HI 0%	1.032	19.9
RPP⁃HI 10%	1.035	20.2
RPP⁃HI 30%	1.040	20.6
RPP⁃HI 50%	1.042	20.8

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