Reaction‐induced phase separation and resulting thermomechanical and surface properties of epoxy resin/poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) blends cured with 4,4′‐diaminodiphenylsulfone |
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| Authors: | Jyotishkumar Parameswaranpillai Sisanth Krishnan Sidhardhan Seno Jose Suchart Siengchin Jürgen Pionteck Anthony Magueresse Yves Grohens Nishar Hameed |
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| Affiliation: | 1. Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, Kerala, India;2. Government College, Kottayam, Kerala, India;3. Department of Materials and Production Engineering, King Mongkut's University of Technology North Bangkok 1518 Pracharaj 1, Wongsawang Road, Bangsue, Bangkok, Thailand;4. Leibniz Institute of Polymer Research Dresden, Dresden, Germany;5. FRE CNRS 3744, IRDL, Univ. Bretagne Sud, Lorient, France;6. Factory of the Future, Swinburne University of Technology, Hawthorn, Australia |
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| Abstract: | We investigated the phase separation, cure kinetics and thermomechanical properties of diglycidyl ether of bisphenol‐A/4,4′‐diaminodiphenylsulfone/poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) (PEO–PPO–PEO) triblock copolymer (TBCP) blends. Fourier transform infrared spectroscopy, differential scanning calorimetry, and atomic force microscopy revealed that the blends exhibited heterogeneous phase morphology in which the TBCP formed dispersed domains in epoxy matrix, due to reaction induced phase separation. A fraction of phase‐separated PEO phase underwent partial crystallization whereas another fraction formed interphases between the dispersed domains and epoxy matrix. Moreover, the dispersed PEO chains improved the compatibility and interfacial adhesion between the matrix and domains and, consequently, significantly improved the mechanical properties of epoxy resin. Furthermore, the thermal degradation studies and contact angle measurements disclosed that the dispersed domains were well protected by the epoxy matrix. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44406. |
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| Keywords: | glass transition mechanical properties microscopy structure– property relationships thermal properties |
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