Sol-gel transition in di-(2-ethylhexyl) phthalate-plasticized poly(vinyl chloride)
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- Title
- Sol-gel transition in di-(2-ethylhexyl) phthalate-plasticized poly(vinyl chloride)
- Authors
- Lee, CH; Nah, JW; Cho, KW; Kim, SH; Hahn, A
- Date Issued
- 2003-10-20
- Publisher
- KOREAN CHEMICAL SOC
- Abstract
- The gelation for di-(2-ethylhexyl) phthalate (DEHP)-plasticized poly(vinyl chloride) was studied by measuring time-resolved small-angle X-ray scattering (SAXS) and a flow of the solutions in test tube. It was found that for the gelation there were three regimes. At Regime I, the solution rapidly changed to a gel, and the SAXS intensity showed a peak and the peak intensity increased, keeping the peak angle constant. Applying the SAXS intensity to the kinetic analysis of the liquid-liquid phase separation, it was revealed that the spinodal decomposition proceeded to develop a periodic length of 29.9 nanometer in size, a hydrogen-bonding-type association in polymer rich phase followed, and then it induced fast gelation rate. At Regime II, the gelation slowly occurred and the SAXS intensity was not observed, suggesting that a homogeneous gel network was formed by a hydrogen-bonding. At regime III, the solution was a homogeneous sol.
- Keywords
- sol-gel transition; DEHP-plasticized PVC; small angle X-ray scattering; PHASE-SEPARATION; PVC; SCATTERING; GELATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28235
- DOI
- 10.5012/bkcs.2003.24.10.1485
- ISSN
- 0253-2964
- Article Type
- Article
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 24, no. 10, page. 1485 - 1489, 2003-10-20
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