PMID- 34035941
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240402
IS  - 2054-5703 (Print)
IS  - 2054-5703 (Electronic)
IS  - 2054-5703 (Linking)
VI  - 8
IP  - 3
DP  - 2021 Mar 31
TI  - Study of crystallization behaviour of electron beam irradiated polypropylene and 
      high-density polyethylene.
PG  - 202250
LID - 10.1098/rsos.202250 [doi]
LID - 202250
AB  - The influence of electron-beam irradiation on polypropylene (PP) and high-density 
      polyethylene (HDPE) was investigated with a focus on crystallization. A 
      high-temperature (200 degrees C) creep test revealed that the HDPE gradually increased 
      cross-linking density in the range 30-120 kGy, while the PP underwent a chain 
      scission which was quantitatively evaluated by gel permeation chromatography. The 
      mechanical properties were measured in the range -150 to 200 degrees C by a dynamic 
      mechanical analysis. A small presence of C=C and C=O bonds was found in the 
      irradiated PP by a Fourier transform infrared spectroscopy. Crystallization 
      kinetics measured by differential scanning calorimetry and hot-stage optical 
      microscopy results were influenced tremendously by irradiation for HDPE and to a 
      lesser extent for PP. Irradiation caused a decrease in both the number of 
      nucleation centres and the growth rate of individual spherulites. Crystallization 
      was analysed in detail with the help of Hoffman-Lauritzen, Avrami and Arrhenius 
      equations. Interestingly an increasing beta-crystal formation with an increasing 
      irradiation level was discovered for PP by X-ray diffraction. A generation of 
      defects in the crystalline structure owing to irradiation was discussed.
CI  - (c) 2021 The Authors.
FAU - Svoboda, Petr
AU  - Svoboda P
AUID- ORCID: 0000-0002-7320-5467
AD  - Department of Polymer Engineering, Faculty of Technology, Tomas Bata University 
      in Zlin, Vavreckova 275, 762 72 Zlin, Czech Republic.
FAU - Trivedi, Krunal
AU  - Trivedi K
AUID- ORCID: 0000-0001-9389-9737
AD  - Department of Polymer Engineering, Faculty of Technology, Tomas Bata University 
      in Zlin, Vavreckova 275, 762 72 Zlin, Czech Republic.
FAU - Stoklasa, Karel
AU  - Stoklasa K
AUID- ORCID: 0000-0003-3947-6447
AD  - Department of Polymer Engineering, Faculty of Technology, Tomas Bata University 
      in Zlin, Vavreckova 275, 762 72 Zlin, Czech Republic.
FAU - Svobodova, Dagmar
AU  - Svobodova D
AUID- ORCID: 0000-0001-5512-4965
AD  - Faculty of Humanities, Tomas Bata University in Zlin, Stefanikova 5670, 760 01 
      Zlin, Czech Republic.
FAU - Ougizawa, Toshiaki
AU  - Ougizawa T
AUID- ORCID: 0000-0002-7761-6909
AD  - Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 
      2-12-1-S8-33, Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
LA  - eng
SI  - Dryad/10.5061/dryad.dv41ns1wx
PT  - Journal Article
DEP - 20210331
PL  - England
TA  - R Soc Open Sci
JT  - Royal Society open science
JID - 101647528
PMC - PMC8101015
OTO - NOTNLM
OT  - beta-phase
OT  - crystallization
OT  - irradiation
OT  - polymer
OT  - spherulite
EDAT- 2021/05/27 06:00
MHDA- 2021/05/27 06:01
PMCR- 2021/03/31
CRDT- 2021/05/26 06:55
PHST- 2021/05/26 06:55 [entrez]
PHST- 2021/05/27 06:00 [pubmed]
PHST- 2021/05/27 06:01 [medline]
PHST- 2021/03/31 00:00 [pmc-release]
AID - rsos202250 [pii]
AID - 10.1098/rsos.202250 [doi]
PST - epublish
SO  - R Soc Open Sci. 2021 Mar 31;8(3):202250. doi: 10.1098/rsos.202250.