We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Simultaneous measurement of normal force and electrical resistance during isothermal crystallization for carbon black filled high-density polyethylene.
- Authors
Liu, Zhihua; Song, Yihu; Shangguan, Yonggang; Zheng, Qiang
- Abstract
The kinetics of isothermal crystallization for high-density polyethylene (HDPE) containing different volume fraction (Φ) of carbon black (CB) have been evaluated by using differential scanning calorimetry (DSC) at 123, 124, and 125 °C where the rate of crystallization is moderate. Simultaneous measurement of normal force ( F N) and electrical resistance ( R) has been performed to probe the process of isothermal crystallization at strain zero. Results reveal that, at the early stage of crystallization, F N is almost independent of time ( t) while relative resistance ( R/R 0) changes slightly with increasing time t. However, a significant increment in F N and a remarkable change in R/R 0 can be observed at the same critical time ( t c), and the value of t c is dependent on the crystallization temperature and CB content, which is available for describing the isothermal crystallization as a characteristic parameter. It is found that t c is greater than induction time of crystallization ( t 0) due to the less sensitivity of mechanical and electrical responses than enthalpy to the structural changes in the composites. It is suggested that mechanical and electrical simultaneous measurement endows us a novel approach to probing the formation of percolation network involving in crystallization of polymer matrix.
- Subjects
ELECTRIC resistance; CRYSTALLIZATION; HIGH density polyethylene; PERCOLATION; CALORIMETRY; CARBON
- Publication
Journal of Materials Science, 2008, Vol 43, Issue 14, p4828
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-008-2697-8