The effects of solvent type and aging on structural development in poly(vinyl chloride) thermoreversible gels
SCIE
SCOPUS
- Title
- The effects of solvent type and aging on structural development in poly(vinyl chloride) thermoreversible gels
- Authors
- Hwang, M; Yang, H; Park, S; Lee, DH; Cho, K
- Date Issued
- 2008-02-01
- Publisher
- JOHN WILEY & SONS INC
- Abstract
- We investigated the effects of solvent type (mono-ester vs. di-ester solvent) and aging on the structural development in the poly(vinyl chloride)/butyl benzoate (PVC/BB) and PVC/dibutyl phthalate(DBP) gels, as well as on their viscoelastic and mechanical behaviors. It was found that aged PVC/DBP gels held at RT for 7 days exhibit an improvement of about 100% in storage modulus (G') compared to fresh gels, with a sudden drop in G' around 50 degrees C, whereas the storage moduli of the PVC/BB gels decrease monotonically with temperature, irrespective of the postaging time. These different behaviors of the PVC/BB and PVC/DBP gels arise mainly because of the difference in the network structure produced by the formation of the polymer-solvent complex between the C = O groups of the solvent and the polarized hydrogen moieties of PVC, as was confirmed with small angle X-ray scattering and uniaxial tensile experiments. (C) 2007 Wiley Periodicals, Inc.
- Keywords
- aging; gel network; gels; polyvinyl chloride; SAXS; thermoreversible; X-RAY-SCATTERING; CHEMICALLY-MODIFIED PVCS; PHYSICAL GELS; VISCOELASTIC BEHAVIOR; DILUTE-SOLUTIONS; POLYVINYL-CHLORIDE); SPECTROSCOPY; COMPLEX
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22955
- DOI
- 10.1002/POLB.21363
- ISSN
- 0887-6266
- Article Type
- Article
- Citation
- JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, vol. 46, no. 3, page. 263 - 271, 2008-02-01
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