Modulated differential scanning calorimetry - Analysis of interphases in multi-component polymer materials

A modulated-temperature differential scanning calorimetry (M-TDSC) method f or the analysis of interphases in multi-component polymer materials has bee n developed further. As examples, interphases in a polybutadiene-natural ru bber (50:50 by mass) blend, a poly(methyl methacrylate)-poly(vinyl acetate) (50:50 by mass) structured latex film, a polyepichlorohydrin-poly(vinyl ac etate) bilayer film, and polystyrene-polyurethane (40:60 by mass) and poly( ethyl methacrylate)-polyurethane (60:40 by mass) interpenetrating polymer n etworks were investigated. The mass fraction of interphase and its composit ion can be calculated quantitatively. These interphases do not exhibit clea r separate glass transition temperatures, but occur continually between the glass transition temperatures of the constituent polymers.