PMID- 31218035
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200929
IS  - 2054-5703 (Print)
IS  - 2054-5703 (Electronic)
IS  - 2054-5703 (Linking)
VI  - 6
IP  - 5
DP  - 2019 May
TI  - Preparation of high-performance polyethylene tubes under the coexistence of 
      silicone cross-linked polyethylene and rotation extrusion.
PG  - 182095
LID - 10.1098/rsos.182095 [doi]
LID - 182095
AB  - In this study, the silicone cross-linked polyethylene (Si-XLPE) powder with 
      better thermoplastic performance and abundant cross-linked network points was 
      attained by using solid-state shear mechanochemical (S(3)M) technology and it was 
      added into high-density polyethylene (HDPE) matrix to prepare Si-XLPE/HDPE tubes 
      by a rotation extrusion rheometer. SEM and 2D-SAXS experiments showed that the 
      presence of Si-XLPE and rotation extrusion facilitated the formation of stable 
      shish-kebabs which deviated from the axial direction in polyethylene (PE) tubes. 
      This result was interpreted that introduction of Si-XLPE in PE tubes provided 
      abundant molecular cross-linked network structures, which suppressed the thermal 
      movement and relaxation of oriented molecular chains owing to intermolecular 
      interaction. Moreover, the axial and hoop flow field further promoted orientation 
      of the permanent cross-linked network entanglement points and formation of more 
      stable cluster-like shish structures in the off-axial direction during the 
      rotation extrusion process. Besides, our experimental results had also 
      ascertained that molecular orientation and shish-kebabs in off-axial direction 
      should be the primary responsibility for the remarkable enhancement of hoop 
      torsional strength in PE tubes. Hoop torsional strength of PE tubes adding 
      Si-XLPE reached 19.58 MPa when the mandrel rotation rate was 30 r.p.m., while 
      that of conventional extruded PE tubes was only 9.83 MPa. As a consequence, PE 
      tubes with excellent performance were prepared under the combined effect of 
      Si-XLPE and rotation extrusion.
FAU - Sun, Fasen
AU  - Sun F
AUID- ORCID: 0000-0002-3014-9215
AD  - State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute 
      of Sichuan University, Chengdu 610065, People's Republic of China.
FAU - Guo, Jia
AU  - Guo J
AD  - State Key Laboratory of Special Functional Waterproof Materials, Beijing Oriental 
      Yuhong Waterproof Technology Co., Ltd, No. 2 Shaling Section, Shunping Road, 
      Beijing 100020, Peoples' Republic of China.
FAU - Li, Yijun
AU  - Li Y
AD  - State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute 
      of Sichuan University, Chengdu 610065, People's Republic of China.
FAU - Bai, Shibing
AU  - Bai S
AD  - State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute 
      of Sichuan University, Chengdu 610065, People's Republic of China.
FAU - Wang, Qi
AU  - Wang Q
AD  - State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute 
      of Sichuan University, Chengdu 610065, People's Republic of China.
LA  - eng
PT  - Journal Article
DEP - 20190529
PL  - England
TA  - R Soc Open Sci
JT  - Royal Society open science
JID - 101647528
PMC - PMC6549968
OTO - NOTNLM
OT  - hoop torsional strength
OT  - micro-rotation rheological equipment
OT  - off-axial direction
OT  - silicone cross-linked polyethylene
COIS- We have no competing interests.
EDAT- 2019/06/21 06:00
MHDA- 2019/06/21 06:01
PMCR- 2019/05/29
CRDT- 2019/06/21 06:00
PHST- 2018/12/14 00:00 [received]
PHST- 2019/04/15 00:00 [accepted]
PHST- 2019/06/21 06:00 [entrez]
PHST- 2019/06/21 06:00 [pubmed]
PHST- 2019/06/21 06:01 [medline]
PHST- 2019/05/29 00:00 [pmc-release]
AID - rsos182095 [pii]
AID - 10.1098/rsos.182095 [doi]
PST - epublish
SO  - R Soc Open Sci. 2019 May 29;6(5):182095. doi: 10.1098/rsos.182095. eCollection 
      2019 May.