Glass Transition Behaviour of Acrylic Donor or Acceptor Copolymers--Homopolymers and Their Polymer Blends With EDA Complexation

Glass transition temperature (T sub g ) vs. composition studies on acrylic copolymers of electron donor N-(2-hydroxyethyl-3,5-dinitrobenzoyl acrylate show specific nonlinear composition dependences comparable with those of the methacrylate copolymers. Blends of methylacrylic donor and n-butylacrylic...

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Bibliographic Details
Published in:Thermochimica acta 1989-10, Vol.160 (1), p.103-112
Main Authors: Epple, U, Scheider, H A
Format: Article
Language:English
Online Access:Get full text
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Summary:Glass transition temperature (T sub g ) vs. composition studies on acrylic copolymers of electron donor N-(2-hydroxyethyl-3,5-dinitrobenzoyl acrylate show specific nonlinear composition dependences comparable with those of the methacrylate copolymers. Blends of methylacrylic donor and n-butylacrylic acceptor copolymers or vice versa are compatible, if the incorporated donor or acceptor groups exceed approx 35 mol%. The application of the virial equation--an extended Gordon--Taylor equation--for the T sub g of compatible polymer blends, composed of homopolymer acrylic or methacrylic donor and homopolymer acrylic or methacrylic acceptor implies both strong energetic interactions of the heterocontacts and associated free-volume effects due to conformational rearrangements in the neighbourhood of the binary heterocontacts. Graphs. 21 ref.--AA
ISSN:0040-6031