Effect of Additives on Thermal Properties

FIGURE 6.7 Effect of adding dioctyl phthalate (DOP) (a plasticizer), squares, or imidazoliuiii ionic liquid additives (bmimPF6 or hmimPF6), circles, to PMMA on Tg [5]. Reproduced by permission of the Royal Society of Chemistry. 

Some other useful observations regarding Tg and T are that for polymers with a symmetrical repeating unit, such as polyethylene —(CH2—CH2)— and poly(vinylidene chloride), or Saran , (CH2—CCI2)—, 1/2 (for absolute Ts) for unsymmetrical 

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