Miscibility

About: Miscibility is a research topic. Over the lifetime, 5521 publications have been published within this topic receiving 133547 citations. The topic is also known as: miscible.

Miscibility of Styrene−Maleic Anhydride and Styrene−Acrylonitrile Blends Studied by Positron Annihilation Lifetime Spectroscopy

Abstract: Blends of melt-mixed styrene−maleic anhydride and styrene−acrylonitrile copolymers were examined with respect to miscibility and free volume parameters. Differential scanning calorimetry, dynamic m...

Epoxy resin/poly(ε-caprolactone) blends cured with 2,2-bis[4-(4-aminophenoxy)phenyl]propane. I. Miscibility and crystallization kinetics

Abstract: Crystalline thermosetting blends composed of 2,2′-bis[4-(4-aminophenoxy)-phenyl]propane (BAPP)-cured epoxy resin (ER) and poly(e-caprolactone) (PCL) were prepared via the in situ curing reaction of epoxy monomers in the presence of PCL, which started from initially homogeneous mixtures of diglycidyl ether of bisphenol A (DGEBA), BAPP, and PCL. The miscibility of the blends after and before the curing reaction was established with differential scanning calorimetry and dynamic mechanical analysis. Single and composition-dependent glass-transition temperatures (T's) were observed in the entire blend composition after and before the crosslinking reaction. The experimental T's were in good agreement with the prediction by the Fox and Gordon-Taylor equations. The curing reaction caused a considerable increase in the overall crystallization rate and dramatically influenced the mechanism of nucleation and the growth of the PCL crystals. The equilibrium melting point depression was observed for the blends. An analysis of the kinetic data according to the Hoffman-Lauritzen crystallization kinetic theory showed that with an increasing amorphous content, the surface energy of the extremity surfaces increased dramatically for DGEBA/PCL blends but decreased for ER/PCL blends.

Miscibility Behavior and Interaction Mechanism of Polymer Electrolytes Comprising LiClO4 and MPEG-block-PCL Copolymers

Abstract: We have used DSC, FTIR spectroscopy, and ac impedance techniques to investigate in detail the miscibility behavior, interaction mechanism, and ionic conductivity of polymer electrolytes composed of lithium perchlorate (LiClO4) and monomethoxypoly(ethylene glycol)-block-poly(e-caprolactone) (MPEG−PCL) diblock copolymer The existence of the PCL phase in the MPEG−PCL block copolymer tends to retard the crystallinity of MPEG and results in a higher ionic conductivity for the LiClO4/MPEG−PCL based polymer electrolyte DSC analyses indicate that the phase separation occurs for some compositions of the LiClO4/MPEG−PCL blends In addition, FTIR spectroscopy studies reveal the complicated interactions that occur within the LiClO4/MPEG−PCL blend system upon varying the LiClO4 content and increasing the temperature For the LiClO4/MPEG−PCL blend system, the relative intensity of the “complexed” carbonyl stretching band of the PCL block tends to increase when either the LiClO4 concentration or the length of the PCL