Multicomponent polymer materials glass transition

THE GLASS TRANSITION BEHAVIOR OF MULTICOMPONENT POLYMER MATERIALS 693 Table 13.2 Selected pairs of miscible polymers... 

THE GLASS TRANSITION BEHAVIOR OF MULTICOMPONENT POLYMER MATERIALS... 

Finally, extensions of the techniques to other materials are obvious. Some are straightforward if they involve a melt close to a glass transition or if they are very viscous this depends only on the possibilities of the chemistry of deuteration star and ring polystyrene, blends, ionomers, and possibly semirigid polymers and compatible copolymers. The use of other techniques (Sect. 2) would be required for more liquid materials, as multicomponent solutions, where again neutron scattering has no equivalent. 

If appreciable mixing between the component polymers occurs, the inward shift in the Tg of the two phases can each be expressed by the equations of Section 8.8.1 (125). Using equation (8.73), the extent of mixing within each phase in a simultaneous interpenetrating network of an epoxy resin and poly(n-butyl acrylate) was calculated (see Table 8.10). The overall composition was 80/20 epoxy/acrylic, and glycidyl methacrylate is shown to enhance molecular mixing between the chains. Chapter 13 provides additional material on the glass transition behavior of multicomponent materials. 

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