Optical properties of IPN-like networks polyethylene/poly (butylmethacrylate-co-styrene) copolymer systems. III. Influence of copolymer crosslinkers

Poly[butylmethacrylate (BMA)-co-styrene(S)] copolymers and low-density polyethylene (PE) IPN-like networks were synthesized by a procedure described in earlier papers. ent molar BMA/S copolymer molar ratios starting from 50/50 up to 100/0 and a molar percentage of 1.0 of two copolymer crosslinkers, divinylbenzene and 1,4-butanedioldimethacrylate were used. mples were analysed at room temperature (RT) by WAXS, swelling in CCl4 and mechanical tests. Dynamic mechanical tests and optical investigations were performed in a temperature range between RT and 180°C. PN types, at high copolymer BMA contents, showed a matching–mismatching optical transition of PE and copolymer refractive index with varying temperature. pe of the copolymer crosslinker influenced sensitively all the investigated properties.