Development of discrete nanopores I: Tension of polypropylene polyethylene copolymer blends
- Authors
- Lee, Jonghwi; Macosko, Christopher W.; Bates, Frank S.
- Issue Date
- Mar-2004
- Publisher
- WILEY
- Keywords
- polyolefins; crazing; poly(propylene) (PP); polyethylene copolymers; porous film
- Citation
- JOURNAL OF APPLIED POLYMER SCIENCE, v.91, no.6, pp 3642 - 3650
- Pages
- 9
- Journal Title
- JOURNAL OF APPLIED POLYMER SCIENCE
- Volume
- 91
- Number
- 6
- Start Page
- 3642
- End Page
- 3650
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/57554
- DOI
- 10.1002/app.13602
- ISSN
- 0021-8995
1097-4628
- Abstract
- Porous polymeric materials can be prepared by using micromechanical deformations. The development of porous structures in the tension of polyolefin blends are studied with the goal of developing a novel technique to make porous films. It is found in polypropylene/polyethylene copolymer blends of near 50/50 weight ratio that a metallocene polymer pair can produce stable nanopores throughout a wide range of strain, similar to50-700%. Its strain-to-break was relatively high, although its continuous phase is a brittle polypropylene. The typical size of nanopores is 10-300 nm; they start to develop at approximately 50% strain. The disruption of craze-like structures into discrete nanopores seems to be the key mechanism in stabilizing pore development. Varying stretching direction and speed controls the pore morphology. (C) 2004 Wiley Periodicals, Inc.
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Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
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