glass transition of a single chain : approach for rubber elasticity In non-equilibrium state

研究了聚苯乙烯（PS）在甲苯（MSL）中的玻璃化转变。在较宽的温度范围内测量了聚苯乙烯溶液的复合剪切模量。对模量数据进行时间-温度叠加，构建复合曲线。线性阻尼扭转振子模型很好地描述了聚苯乙烯玻璃化转变对应模量的频率依赖性，表明聚苯乙烯的链连性决定了溶液中的玻璃化弛豫，而链间相互作用对弛豫的影响较小，这与块体聚苯乙烯的情况有很大不同。

The glass transition of polystyrene (PS) dissolved in mesitylene (MSL) was studied. The complex shear modulus of the polystyrene solutions was measured over a wide temperature range. The modulus data were time-temperature superposed to construct the composite curve. The frequency dependence of the modulus corresponding to the glass transition of polystyrene was well described by the linear damped torsional oscillator model, suggesting that the chain connectivity of PS governs the glassy relaxation in the solutions and the inter-chain interaction has a minor effect on this relaxation, which is quite different from the situation in bulk PS.