Mechanical properties-morphology of rolltruded propylene ethylene block copolymers |
| |
Authors: | C. Lin G. F. Zeis M. Kojima J. H. Magill H. Satake |
| |
Affiliation: | (1) Department of Materials Science and Engineering, School of Engineering, University of Pittsburgh, 15261 Pittsburgh, PA, USA;(2) Research Department, Chisso Petrochemical Corporation, Chiba, Japan;(3) Present address: ONR EUROPE, 223-231 Old Marylebone Rd, NW1 5TH London |
| |
Abstract: | Commercially available propylene-ethylene (P/E) block copolymers have been processed by the rolltrusion technique. Properties such as tensile modulus, tensile strength and sample clarity are significantly enhanced compared to the original commercial material. The latter is found to be comprised of ethylene globules distributed uniformly or heterogenously throughout the P/E copolymer, depending upon the manufacturing process. In the rolltruded copolymer, the mechanical and morphological properties depend upon the processing temperature and deformation ratio experienced by the workpiece. The chemical composition of the P/E copolymers also plays a significant part in the improvements in properties induced via rolltrusion that may be carried out below or above the melting temperature of the ethylene component of the copolymers. Differential scanning calorimetry thermograms are very useful in assessing transitional behaviour in this respect and may be used to distinguish between different copolymers (processed and original samples). Correlations among some properties and processing conditions are presented and discussed in relation to polymer composition-processing conditions-morphology-property relationships. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|