PMID- 31936795
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200930
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 12
IP  - 1
DP  - 2020 Jan 10
TI  - High-Precision Monitoring of Average Molecular Weight of Polyethylene Wax from 
      Waste High-Density Polyethylene.
LID - 10.3390/polym12010188 [doi]
LID - 188
AB  - High-density polyethylene (HDPE) is a major component of polyethylene waste, yet 
      only under 29.9% of waste HDPE is recycled. As an important additive, 
      polyethylene wax (PEW) is increasingly used in many industries such as plastics, 
      dyes, and paints. The preparation of PEW has received considerable interest 
      because recycling and precisely controllable production can bring huge economic 
      benefits. In this study, to recycle waste HDPE, a single screw extruder was 
      innovatively combined with a connecting pipe to prepare PEW from the pyrolysis of 
      waste HDPE. Using a test platform, PEWs were prepared under different pyrolysis 
      temperatures and screw speeds, and corresponding number-average molecular weights 
      (NAMWs) of PEWs were measured. To precisely monitor NAMW of PEW, a program was 
      developed in MATLAB. First, the relationship between NAMW and pyrolysis ratio was 
      obtained, and a measure-point-independence verification was conducted. Then, 
      modified Arrhenius equations and time-dependent pyrolysis temperature were for 
      the first time introduced into the HDPE pyrolysis model. Furthermore, the 
      screw-speed-dependent inverse method was proposed and validated for 
      high-precision monitoring of NAMW of PEW from the pyrolysis of waste HDPE by 
      extrusion. PEW of desired molecular weight was able to be precisely obtained from 
      waste HDPE.
FAU - Guo, Zhouchao
AU  - Guo Z
AD  - School of Mechanical and Electrical Engineering, Beijing University of Chemical 
      Technology, Beijing 100029, China.
FAU - Lan, Xia
AU  - Lan X
AD  - School of Mechanical and Electrical Engineering, Beijing University of Chemical 
      Technology, Beijing 100029, China.
FAU - Xue, Ping
AU  - Xue P
AD  - School of Mechanical and Electrical Engineering, Beijing University of Chemical 
      Technology, Beijing 100029, China.
LA  - eng
GR  - 51673021/National Natural Science Foundation of China/
PT  - Journal Article
DEP - 20200110
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC7023213
OTO - NOTNLM
OT  - HDPE pyrolysis
OT  - extrusion
OT  - high-precision monitoring
OT  - polyethylene wax
COIS- The authors declare no conflict of interest.
EDAT- 2020/01/16 06:00
MHDA- 2020/01/16 06:01
PMCR- 2020/01/10
CRDT- 2020/01/16 06:00
PHST- 2019/09/14 00:00 [received]
PHST- 2019/12/06 00:00 [revised]
PHST- 2020/01/05 00:00 [accepted]
PHST- 2020/01/16 06:00 [entrez]
PHST- 2020/01/16 06:00 [pubmed]
PHST- 2020/01/16 06:01 [medline]
PHST- 2020/01/10 00:00 [pmc-release]
AID - polym12010188 [pii]
AID - polymers-12-00188 [pii]
AID - 10.3390/polym12010188 [doi]
PST - epublish
SO  - Polymers (Basel). 2020 Jan 10;12(1):188. doi: 10.3390/polym12010188.