Polystyrene crosslinked with oligomeric and polymeric poly(dimethyl siloxane) derivatives. Thermal and dynamic mechanical studies | Zendy

Tenhu Heikki | Zendy; Heino EevaLeena | Zendy

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Polystyrene crosslinked with oligomeric and polymeric poly(dimethyl siloxane) derivatives. Thermal and dynamic mechanical studies

Author(s) -

Tenhu Heikki,

Heino EevaLeena

Publication year - 1992

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1992.070440106

Subject(s) - molar mass , polystyrene , siloxane , materials science , bifunctional , polymer chemistry , polymer , styrene , viscosity , rheology , copolymer , chemical engineering , composite material , chemistry , organic chemistry , catalysis , engineering

Styrene has been copolymerized with various bifunctional poly(dimethyl siloxane) cross‐linkers having molar masses in the range 200–35,000. Calorimetric and rheological measurements show that the crosslinkers change T g , T ll , and T exo , as well as melt viscosity and elasticity of polystyrene. These changes are strongly dependent on the molar mass of the crosslinker. Increasing the length of the siloxane crosslinker lowers T g and melt viscosity, if the molar mass of the crosslinker is in a range 200–2000. Copolymerizing styrene with a bifunctional poly(dimethyl siloxane) having molar mass near 35,000 leads to a phase‐separated polymer where polystyrene phase largely retains its original properties.

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