Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/44924
Title: Synthesis and characterization of copolymers of styrene and N-methylolacrylamide
Author: Frias, J.B.
Lopez, F.J.
Alonso, N.
Mendizábal, E. M.
Puig, J.E.
Issue Date: 1993
Abstract: Copolymers of styrene (ST) and N-methylolacrylamide (NMA) were synthesized by emulsion polymerization for different initial weight ratios of ST/NMA. Fast reaction rates and high conversions are achieved regardless of the ST/NMA ratio. NMA content in copolymers, as deduced by DSC, FTIR and Kjeldhal analysis, is higher as the initial ST/NMA ratio decreases. Glass transition temperature of copolymers increases as the ST/NMA ratio decreases and it decreases with reaction time for a fixed ST/NMA ratio. The latter results and FTIR spectra as well as Kjeldhal analysis as a function of reaction time indicate that NMA reacts initially in the aqueous phase, after which ST, because of its overall larger concentration, is incorporated preferentially in the polymer. © 1993 Springer-Verlag.
URI: http://www.scopus.com/inward/record.url?eid=2-s2.0-0008438502&partnerID=40&md5=a8a188301f7858df8ad06d6f2e5fc9fc
http://hdl.handle.net/20.500.12104/44924
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