PMID- 35423216
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220416
IS  - 2046-2069 (Electronic)
IS  - 2046-2069 (Linking)
VI  - 11
IP  - 12
DP  - 2021 Feb 4
TI  - Structures and impact strength variation of chemically crosslinked high-density 
      polyethylene: effect of crosslinking density.
PG  - 6791-6797
LID - 10.1039/d0ra10365a [doi]
AB  - Impact strength of high-density polyethylene (HDPE), especially at low 
      temperature, is crucial for its applications outdoors because of its poor impact 
      strength. In order to improve the impact strength of HDPE, crosslinked HDPE was 
      prepared by the addition of a peroxide crosslink agent, 
      bis(tert-butyldioxyisopropyl)benzenehexane, and the effect of the crosslinking 
      density on the microstructures and mechanical properties, especially impact 
      strength between -60  degrees C and 23  degrees C, were investigated. The results show that the 
      crosslinking density is controlled by varying the content of the crosslinking 
      agent. It is found that, at room temperature, with increase in the content of 
      crosslink agent from 0% to 0.5-0.7%, the impact strength increases from 4 kJ 
      m(-2) to about 80 kJ m(-2) and the elongation at break increases from 20% to 
      about 550%. With further increase in the content of crosslink agent to 1.5%, the 
      impact strength and the elongation at break reduce to 64 kJ m(-2) and 360% 
      respectively. With increase in crosslink agent, the flexural modulus, yield 
      strength, crystallinity, mean lamellar thickness, crystal size and spherulitic 
      size and the brittle-ductile transition temperature (BDTT) decrease, and the gel 
      content, impact strength of the HDPE at low temperature, intensity of beta 
      transition increase significantly. In considering both the room temperature 
      mechanical properties and low temperature impact strength, the optimized content 
      of the crosslink agent is about 0.7%. Overall, crosslinking significantly 
      improves the toughness and impact strength of HDPE and extends its application, 
      especially at low temperature.
CI  - This journal is (c) The Royal Society of Chemistry.
FAU - Ren, Yueqing
AU  - Ren Y
AUID- ORCID: 0000-0001-6330-7163
AD  - National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping 
      District Beijing 102211 China yueqing.ren@chnenergy.com.cn.
FAU - Sun, Xiaojie
AU  - Sun X
AD  - National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping 
      District Beijing 102211 China yueqing.ren@chnenergy.com.cn.
FAU - Chen, Lanlan
AU  - Chen L
AD  - National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping 
      District Beijing 102211 China yueqing.ren@chnenergy.com.cn.
FAU - Li, Yafei
AU  - Li Y
AD  - National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping 
      District Beijing 102211 China yueqing.ren@chnenergy.com.cn.
FAU - Sun, Miaomiao
AU  - Sun M
AD  - National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping 
      District Beijing 102211 China yueqing.ren@chnenergy.com.cn.
FAU - Duan, Xuelei
AU  - Duan X
AD  - National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping 
      District Beijing 102211 China yueqing.ren@chnenergy.com.cn.
FAU - Liang, Wenbin
AU  - Liang W
AD  - National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping 
      District Beijing 102211 China yueqing.ren@chnenergy.com.cn.
LA  - eng
PT  - Journal Article
DEP - 20210210
PL  - England
TA  - RSC Adv
JT  - RSC advances
JID - 101581657
PMC - PMC8694873
COIS- There are no conflicts to declare.
EDAT- 2021/02/10 00:00
MHDA- 2021/02/10 00:01
PMCR- 2021/02/10
CRDT- 2022/04/15 05:25
PHST- 2020/12/09 00:00 [received]
PHST- 2021/01/30 00:00 [accepted]
PHST- 2022/04/15 05:25 [entrez]
PHST- 2021/02/10 00:00 [pubmed]
PHST- 2021/02/10 00:01 [medline]
PHST- 2021/02/10 00:00 [pmc-release]
AID - d0ra10365a [pii]
AID - 10.1039/d0ra10365a [doi]
PST - epublish
SO  - RSC Adv. 2021 Feb 10;11(12):6791-6797. doi: 10.1039/d0ra10365a. eCollection 2021 
      Feb 4.