1. Novel Miscible Polymer Blend of Poly(4-trimethylsilylstyrene) and Polyisoprene
- Author
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Masayuki Ohya, Daisuke Kawaguchi, Masashi Harada, Takahisa Suzuki, and Atsushi Takano, and Yushu Matsushita
- Subjects
Materials science ,Polymers and Plastics ,Organic Chemistry ,Flory–Huggins solution theory ,Degree of polymerization ,Lower critical solution temperature ,Inorganic Chemistry ,Differential scanning calorimetry ,Chemical engineering ,Phase (matter) ,Polymer chemistry ,Materials Chemistry ,Polymer blend ,Glass transition ,Phase diagram - Abstract
The phase behavior of the newly found miscible polymer blends poly(4-trimethylsilylstyrene) and polyisoprene was investigated with optical microscopy (OM) and also with differential scanning calorimetry (DSC), while the degree of polymer−polymer interaction was evaluated with small-angle neutron scattering (SANS). The blends with homogeneous one phase at various compositions turned into two phases by heating, showing a lower critical solution temperature (LCST) type phase diagram with a critical temperature of 172 °C if the degree of polymerization is ca. 370. The blend gave a single glass transition temperature below the LCST, and the interaction parameter χ was represented as a function of temperature T according to the relationship χ = 0.027 − 9.5/T.
- Published
- 2005
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