A NEW TRANSPARENT THERMOPLASTIC POLYMER W ITH ELASTOMERIC PROPERTIES

Styroflex is a novel styrenic polymer, featuring properties like high transparency, good processability and recovery (memory effect). Elasto merlike properties result from a linear hard-soft-hard structure, made of styrene, statistical styrene/butadiene and styrene block sequences . The order/disorder transition temperature (ODT) is as low as 145 deg rees C. Thus, Styroflex behaves almost as an ideal Newtonian liquid un der typical processing temperatures like 170-200 degrees C. The time-d ependent stress/strain curves are similar to plasticized PVC and conve ntional SBS rubbers. Styroflex is well miscible with other styrenic po lymers, allowing custom-tailored properties.