PMID- 35054761
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240405
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 14
IP  - 2
DP  - 2022 Jan 17
TI  - Analysis of Mechanical Property Degradation of Outdoor Weather-Exposed Polymers.
LID - 10.3390/polym14020357 [doi]
LID - 357
AB  - It is well known that many polymers are prone to outdoor weathering degradation. 
      Therefore, to ensure the safety and integrity of the structural parts and 
      components made from polymers for outdoor use, their weather-affected mechanical 
      behavior needs to be better understood. In this study, the critical mechanical 
      property for degradation was identified and modeled into a usable format for use 
      in the virtual analysis. To achieve this, an extensive 4-year outdoor weathering 
      test was carried out on polycarbonate (PC), polypropylene (PP), polybutylene 
      terephthalate (PBT), and high-density polyethylene (HDPE) polymers up to a total 
      UV irradiation of 1020 MJ/m(2) at a 315~400 nm wavelength. In addition, tensile 
      tests were performed by collecting five specimens for each material at every 60 
      MJ/m(2) interval. With the identification of fracture strain retention as the key 
      performance index for mechanical property degradation, a fracture strain 
      retention function was developed using logistic regression analysis for each 
      polymer. In addition, a method for using fracture strain retention function to 
      establish a mechanical property degradation dataset was proposed and successfully 
      tested by performing weathering FE analysis on the virtual automotive collision 
      behavior of a PC part under intermittent UV irradiation doses. This work showed 
      the potential of using fracture strain retention function to predict the 
      performance of polymeric components undergoing mechanical property degradation 
      upon outdoor weathering.
FAU - Kim, Sunwoo
AU  - Kim S
AD  - Department of Polymer Science and Engineering, Hannam University, Daejeon 34054, 
      Korea.
AD  - Chemical Materials Solutions Center, Korea Research Institute of Chemical 
      Technology, Daejeon 34114, Korea.
FAU - Lee, Youngmin
AU  - Lee Y
AD  - Advanced Materials R&D, LG Chem Ltd., Daejeon 34122, Korea.
FAU - Kim, Changhwan
AU  - Kim C
AD  - Climate & Environmental Real-Scale Testing Center, Korea Conformity Laboratories, 
      Jincheon-gun 27872, Korea.
FAU - Choi, Sunwoong
AU  - Choi S
AUID- ORCID: 0000-0001-7721-3627
AD  - Department of Polymer Science and Engineering, Hannam University, Daejeon 34054, 
      Korea.
LA  - eng
PT  - Journal Article
DEP - 20220117
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC8782030
OTO - NOTNLM
OT  - finite element method
OT  - fracture strain retention ratio
OT  - logistic regression analysis
OT  - mechanical property degradation
OT  - outdoor weathering degradation
OT  - performance prediction
COIS- The authors declare no conflict of interest.
EDAT- 2022/01/22 06:00
MHDA- 2022/01/22 06:01
PMCR- 2022/01/17
CRDT- 2022/01/21 01:09
PHST- 2021/11/20 00:00 [received]
PHST- 2022/01/10 00:00 [revised]
PHST- 2022/01/13 00:00 [accepted]
PHST- 2022/01/21 01:09 [entrez]
PHST- 2022/01/22 06:00 [pubmed]
PHST- 2022/01/22 06:01 [medline]
PHST- 2022/01/17 00:00 [pmc-release]
AID - polym14020357 [pii]
AID - polymers-14-00357 [pii]
AID - 10.3390/polym14020357 [doi]
PST - epublish
SO  - Polymers (Basel). 2022 Jan 17;14(2):357. doi: 10.3390/polym14020357.