Miscibility and phase separation in poly(vinyl methyl ether)/poly(bisphenol A hydroxy ether) blends

Abstract

Amorphous blends of poly(viny1 methylether) (a, = 63 OOO and M n = 37 OOO) and a copolymer of bisphenol A and epichlorohydrin (M, = 50400 and Mn = 18000) were found to be miscible over the complete range of compositions at temperatures below 420 K. At higher temperatures, blends separate into two phases, giving a LCST-type phase diagram. Heats of demixing and excess heat capacity of a 50:50 blend have also been measured by DSC. The r e s u b have been interpreted in terms of the equation-of-state theory and compared with predictions of a recent model proposed by ten Brinke and Karasz for blends which have direction-specific interactions.

Thermodynamics of polymer mixtures: parameters of the state equation for poly(styrene), poly(vinyl methyl ether) and their mixtures

“…The agreement with the previous data of the literature is excellent. [14][15][16][17][18] The thermal expansion coefficients have been calculated by deriving the above mentioned equations and by using the values of the specific volume listed in the previous Tables. These parameters are also characterised by a linear profile, as shown by the equations of Tab.…”

The solid state13C NMR studies of intermolecular hydrogen bonding formation in a blend of phenolic resin and poly(hydroxyl ether) of bisphenol A

“…High-resolution solid-state 13 C NMR experiments are carried out on a Bruker DSX-300 spectrometer operating at resonance frequencies of 300.13 and 75.475 MHz for 1 H and 13 C, respectively. The 13 C CP-MAS spectra are measured with 3.9 ls 90 8 pulse width; 3s pulse delay time; 30 ms acquisition time; spectral width, 200 ppm; and 2048 scans.…”

“…In spite of the difference in structure and dynamic motion between the phenoxy and the phenol, the specific interaction appears to be the main driving force responsible for Full Paper: The formation of intermolecular hydrogen bonds in blends of novolac type phenolic and poly(hydroxyl ether) of bisphenol A was investigated by studying its T g behavior, excess volume, and solid state 13 C NMR spectra. The T g and parameters of solid state 13 C NMR, such as the T CH and spin-lattice relaxation time in the rotating frame T H 1q , indicate that the London dispersion force (entropically favored) significantly affects the intermolecular hydrogen bonding of the blend. The phenoxy chain forces opening of the intra-association of phenolic and thus creates more free OHs.…”

Influence of the Blending Method and Poly(methyl methacrylate) Tacticity in Its Miscibility with Poly(hydroxy ether of bisphenol A, phenoxy)

“…tc is an Arrhenius type aging characteristic time introduced by Yoshida and coworkers 3°: (3) or, in a more complicated form, by Narayanaswamy40:…”

“…The phenoxy resin (PH), a polymer composed of bisphenol A and epichlorohydrin, has repeatedly been proved to be miscible with poly(ethylene oxide), 1 • 2 poly(vinyl methyl ether), 3 polyesters, 4 • 5 polysulphones, 6 polyamides, 7 etc. It contains a secondary hydroxyl group in the main chain * To whom correspondence should be addressed.…”