✦ LIBER ✦

Polymerization-induced bimodal phase separation in a rubber-modified epoxy system

✍ Scribed by Jianwen Zhang; Hongdong Zhang; Yuliang Yang

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 298 KB
Volume: 72
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19990404)72:1<59::aid-app6>3.0.co;2-p

No coin nor oath required. For personal study only.

✦ Synopsis

The bimodal phase separation process of a rubber-modified epoxy system, consisting of diglycidyl ether of bisphenol A (DGEBA), and a hydroxyl-terminated butadiene-acrylonitrile random copolymer (HTBN), during curing with tetrahydrophthalic anhydride was studied by time-resolved small-angle light scattering (TRSALS), differential scanning calorimetry (DSC), and digital image analysis (DIA). The HTBN/DGEBA mixture reveals an upper critical solution temperature (UCST). At higher curing temperatures, double-peak structure from the matrix was investigated by TRSALS and confirmed by DIA. The special two characteristic size distribution behavior was explained qualitatively by nucleation growth coupled with spinodal decomposition (NGCSD) and the competition between phase separation and polymerization.

📜 SIMILAR VOLUMES

Reaction-induced phase separation in rub

Reaction-induced phase separation in rubber-modified epoxy resins

✍ Keizo Yamanaka; Yasushi Takagi; Takashi Inoue 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 699 KB

Phase separation induced by a chain poly

Phase separation induced by a chain polymerization: Polysulfone-modified epoxy/anhydride systems

✍ P. A. Oyanguren; C. C. Riccardi; R. J. J. Williams; I. Mondragon 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 391 KB

The reaction-induced phase separation in a blend of a commercial polysulfone (PSu) with diepoxide-cyclic anhydride monomers, was studied. The diepoxide was based on diglycidylether of bisphenol A (DGEBA) and the hardener was methyl tetrahydrophthalic anhydride (MTHPA), used in stoichiometric proport

Real time dielectric investigations of p

Real time dielectric investigations of phase separation and cure in rubber modified epoxy resin systems

✍ Costas G. Delides; David Hayward; Richard A. Pethrick; Argyris S. Vatalis 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 630 KB

Real time dielectric and rheological measurements are reported for mixtures of carboxylterminated butadiene acrylonitrile in epoxy resins obtained by curing either with diaminodiphelmethane at 80 ° or triethylenetetramine at 30: with the diglycidylether of bisphenol-A. A good correlation is observed

Rubber-modified epoxies. I. Influence of

Rubber-modified epoxies. I. Influence of carboxyl-terminated butadiene-acrylonitrile random copolymers (CTBN) on the polymerization and phase separation processes

✍ D. Verchere; H. Sautereau; J. P. Pascault; S. M. Moschiar; C. C. Riccardi; R. J. 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 905 KB

Studies on the Phase Separation of Poly(

Studies on the Phase Separation of Poly(ether imide)-Modified Epoxy Resin, 5. Phase Separation Behavior of a Quasi-Binary System

✍ Xianguo Wu; Jun Cui; Yifu Ding; Shanjun Li; Baozhong Dong; Jun Wang 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 128 KB 👁 2 views

A Model System for the Thermodynamic Ana

A Model System for the Thermodynamic Analysis of Reaction-Induced Phase Separation: Solutions of Polystyrene in Bifunctional Epoxy/Amine Monomers

✍ Ileana A. Zucchi; María J. Galante; Julio Borrajo; Roberto J. J. Williams 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 147 KB

## Abstract **Summary:** A model system, consisting of a linear polymer dissolved in a bifunctional monomer/co‐monomer solvent, was selected to test the applicability of the Flory‐Huggins (FH) theory in the absence of the usual assumptions present in the analysis of modified thermosetting polymers.