PMID- 34072928
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210615
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 13
IP  - 11
DP  - 2021 May 31
TI  - Low-Temperature Mechanical Properties of High-Density and Low-Density 
      Polyethylene and Their Blends.
LID - 10.3390/polym13111821 [doi]
LID - 1821
AB  - Low-temperature properties of high-density polyethylene (HDPE), low-density 
      polyethylene (LDPE), linear low-density polyethylene (LLDPE), and their blends 
      were studied. The analyzed low-temperature mechanical properties involve the 
      deformation resistance and impact strength characteristics. HDPE is a bimodal 
      ethylene/1-hexene copolymer; LDPE is a branched ethylene homopolymer containing 
      short-chain branches of different length; LLDPE is a binary ethylene/1-butene 
      copolymer and an ethylene/1-butene/1-hexene terpolymer. The samples of copolymers 
      and their blends were studied by gel permeation chromatography (GPC), 
      differential scanning calorimetry (DSC), (13)capital ES, Cyrillic NMR spectroscopy, and dynamic 
      mechanical analysis (DMA) using testing machines equipped with a cryochamber. It 
      is proposed that such parameters as "relative elongation at break at -45  degrees C" and 
      "Izod impact strength at -40  degrees C" are used instead of the ductile-to-brittle 
      transition temperature to assess frost resistance properties because these 
      parameters are more sensitive to deformation and impact at subzero temperatures 
      for HDPE. LLDPE is shown to exhibit higher relative elongation at break at -45  degrees C 
      and Izod impact strength at -20 / 60  degrees C compared to those of LDPE. LLDPE 
      terpolymer added to HDPE (at a content >/= 25 wt.%) simultaneously increases flow 
      properties and improves tensile properties of the blend at -45  degrees C. Changes in 
      low-temperature properties as a function of molecular weight, MWD, crystallinity, 
      and branch content were determined for HDPE, LLDPE, and their blends. The DMA 
      data prove the resulting dependences. The reported findings allow one to 
      understand and predict mechanical properties in the HDPE-LLDPE systems at subzero 
      temperatures.
FAU - Salakhov, Ildar I
AU  - Salakhov II
AUID- ORCID: 0000-0003-0288-2660
AD  - R&D Center PJSC Nizhnekamskneftekhim, Nizhnekamsk, Sobolekovskaya str. 23, 423574 
      Republic of Tatarstan, Russia.
FAU - Shaidullin, Nadim M
AU  - Shaidullin NM
AUID- ORCID: 0000-0003-2866-4848
AD  - R&D Center PJSC Nizhnekamskneftekhim, Nizhnekamsk, Sobolekovskaya str. 23, 423574 
      Republic of Tatarstan, Russia.
FAU - Chalykh, Anatoly E
AU  - Chalykh AE
AD  - Frumkin Institute of Physical chemistry and Electrochemistry, Russian Academy of 
      Sciences (IPCE RAS), Leninskiy Prospekt, 31, 119071 Moscow, Russia.
FAU - Matsko, Mikhail A
AU  - Matsko MA
AD  - Boreskov Institute of Catalysis Siberian Branch of the Russian Academy of 
      Sciences, Acad. Lavrentiev Prospect 5, 630090 Novosibirsk, Russia.
FAU - Shapagin, Alexey V
AU  - Shapagin AV
AUID- ORCID: 0000-0002-8866-0710
AD  - Frumkin Institute of Physical chemistry and Electrochemistry, Russian Academy of 
      Sciences (IPCE RAS), Leninskiy Prospekt, 31, 119071 Moscow, Russia.
FAU - Batyrshin, Ayrat Z
AU  - Batyrshin AZ
AD  - R&D Center PJSC Nizhnekamskneftekhim, Nizhnekamsk, Sobolekovskaya str. 23, 423574 
      Republic of Tatarstan, Russia.
FAU - Shandryuk, Georgiy A
AU  - Shandryuk GA
AD  - A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences 
      (TIPS RAS), Leninskii pr. 29, 119991 Moscow, Russia.
FAU - Nifant'ev, Ilya E
AU  - Nifant'ev IE
AUID- ORCID: 0000-0001-9151-1890
AD  - A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences 
      (TIPS RAS), Leninskii pr. 29, 119991 Moscow, Russia.
LA  - eng
PT  - Journal Article
DEP - 20210531
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC8198324
OTO - NOTNLM
OT  - blends
OT  - low-temperature characteristics
OT  - mechanical properties
OT  - molecular structure
OT  - polyethylene
COIS- The authors declare no conflict of interest.
EDAT- 2021/06/03 06:00
MHDA- 2021/06/03 06:01
PMCR- 2021/05/31
CRDT- 2021/06/02 01:36
PHST- 2021/04/25 00:00 [received]
PHST- 2021/05/21 00:00 [revised]
PHST- 2021/05/28 00:00 [accepted]
PHST- 2021/06/02 01:36 [entrez]
PHST- 2021/06/03 06:00 [pubmed]
PHST- 2021/06/03 06:01 [medline]
PHST- 2021/05/31 00:00 [pmc-release]
AID - polym13111821 [pii]
AID - polymers-13-01821 [pii]
AID - 10.3390/polym13111821 [doi]
PST - epublish
SO  - Polymers (Basel). 2021 May 31;13(11):1821. doi: 10.3390/polym13111821.