Forced compatibility in poly(methyl acrylate)/poly(methyl methacrylate) sequential interpenetrating polymer networks

Salmerón-Sánchez, M. , Gallego Ferrer, G., Torregrosa Cabanilles, C., Meseguer Dueñas, J.M., Monleón Pradas, M. and Gómez Ribelles, J.L. (2001) Forced compatibility in poly(methyl acrylate)/poly(methyl methacrylate) sequential interpenetrating polymer networks. Polymer, 42(25), pp. 10071-10075. (doi: 10.1016/S0032-3861(01)00530-4)

Abstract

The aim of this work is to study the miscibility of poly(methyl acrylate)/poly(methyl methacrylate), (PMA/PMMA), sequential interpenetrating networks, (IPNs), as a function of the crosslink density using dielectric and dynamic-mechanical techniques. The PMA/PMMA system is immiscible and so, for low crosslink densities, phase separation appears, as detected by the occurrence of two clearly differentiated main dynamic-mechanical relaxation processes corresponding to the two components. If crosslink density is high enough, a homogeneous IPN can be obtained, achieving a forced compatibilization of both networks. The IPN crosslinked with 10% ethyleneglycol dimethacrylate shows a single main dynamic-mechanical relaxation process. Only the α main relaxation process appears in the PMA networks within the temperature range (−60 to 200°C) of the experiments conducted in this work. The dielectric relaxation spectrum of PMMA networks shows the secondary β relaxation followed by a small α relaxation partially overlapped with it. In the IPNs, both the main relaxation processes tend to merge into a single one and the dielectric spectrum shows a single peak that mainly corresponds to the secondary relaxation of the PMMA.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Salmeron-Sanchez, Professor Manuel
• Authors: Salmerón-Sánchez, M., Gallego Ferrer, G., Torregrosa Cabanilles, C., Meseguer Dueñas, J.M., Monleón Pradas, M., and Gómez Ribelles, J.L.
• College/School: College of Science and Engineering > School of Engineering > Biomedical Engineering
• Journal Name: Polymer
• ISSN: 0032-3861
• ISSN (Online): 1873-2291