Investigation on the early and late stage phase-separation dynamics of poly(methyl methacrylate)/poly(α-methyl styrene-co-acrylonitrile) blends through rheological and scattering functions |
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| Authors: | Min Zuo Qiang Zheng |
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| Affiliation: | a Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
b State Key Laboratories of Fluid Power Transmission and Control Institute of Mechatronic Control Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China |
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| Abstract: | The phase-separation behavior of poly(methyl methacrylate)/poly(α-methyl styrene-co-acrylonitrile) (PMMA/α-MSAN) blends with two different compositions was studied by time-resolved small angle light scattering (SALS) in the spinodal decomposition (SD) regime from 160 to 210 °C. The rheological function (WLF-like equation) was introduced into the processing of light scattering data. It was found that the WLF-like equation was applicable to describe the temperature dependence of apparent diffusion coefficient Dapp and the relaxation time τ of normalized scattering intensity (I(t)−I(0))/(Im−I(0)) at the early stage of SD, as well as the relaxation time τ of maximum scattering intensity Im and characteristic scattering vector qm with Im at the late stage of SD for PMMA/α-MSAN blends with two different compositions. This is in consistence with the phase-separation behavior of PMMA/SAN reported in our previous paper. |
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| Keywords: | PMMA/α-MSAN blends Spinodal decomposition WLF-like function |
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