PMID- 26923428
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160923
LR  - 20160309
IS  - 1463-9084 (Electronic)
IS  - 1463-9076 (Linking)
VI  - 18
IP  - 11
DP  - 2016 Mar 21
TI  - Distinct positive temperature coefficient effect of polymer-carbon fiber 
      composites evaluated in terms of polymer absorption on fiber surface.
PG  - 8081-7
LID - 10.1039/c6cp00398b [doi]
AB  - In this article, the positive temperature coefficient (PTC) effect was studied 
      for high-density polyethylene (HDPE)/carbon fiber (CF) composites. All of the 
      samples showed a significant PTC effect during the heating processes without a 
      negative temperature coefficient (NTC) effect, even at a temperature much higher 
      than the melting point of the polymer matrix. An ever-increasing PTC intensity 
      with increasing thermal cycles was observed in our study that had never been 
      reported in previous research. The absence of a NTC effect resulted from the 
      increased binding force between the matrix and fillers that contributed to the 
      very special structure of CF surface. We incorporated thermal expansion theory 
      and quantum tunneling effects to explain PTC effect. From the SEM micrographs for 
      the HDPE/CF composites before and after the different thermal cycles, we found 
      that the surface of CF was covered with a layer of polymer which resulted in a 
      change in the gap length between CF and HDPE and its distribution. We believed 
      that the gap change induced by polymer absorption on the fiber surface had a 
      great effect on the PTC effect.
FAU - Zhang, Xi
AU  - Zhang X
AD  - College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, 
      China. liuzhying@scu.edu.cn yangmb@scu.edu.cn.
FAU - Zheng, Shaodi
AU  - Zheng S
AD  - College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, 
      China. liuzhying@scu.edu.cn yangmb@scu.edu.cn.
FAU - Zheng, Xiaofang
AU  - Zheng X
AD  - College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, 
      China. liuzhying@scu.edu.cn yangmb@scu.edu.cn.
FAU - Liu, Zhengying
AU  - Liu Z
AD  - College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, 
      China. liuzhying@scu.edu.cn yangmb@scu.edu.cn.
FAU - Yang, Wei
AU  - Yang W
AD  - College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, 
      China. liuzhying@scu.edu.cn yangmb@scu.edu.cn and State Key Laboratory of Polymer 
      Materials Engineering, Sichuan University, Chengdu, 610065, China.
FAU - Yang, Mingbo
AU  - Yang M
AD  - College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, 
      China. liuzhying@scu.edu.cn yangmb@scu.edu.cn and State Key Laboratory of Polymer 
      Materials Engineering, Sichuan University, Chengdu, 610065, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Phys Chem Chem Phys
JT  - Physical chemistry chemical physics : PCCP
JID - 100888160
EDAT- 2016/03/01 06:00
MHDA- 2016/03/01 06:01
CRDT- 2016/03/01 06:00
PHST- 2016/03/01 06:00 [entrez]
PHST- 2016/03/01 06:00 [pubmed]
PHST- 2016/03/01 06:01 [medline]
AID - 10.1039/c6cp00398b [doi]
PST - ppublish
SO  - Phys Chem Chem Phys. 2016 Mar 21;18(11):8081-7. doi: 10.1039/c6cp00398b.