PARTICLE OF CARBON-CONTAINING MODIFIED POLYSTYRENE RESIN, EXPANDABLE PARTICLE OF CARBON-CONTAINING MODIFIED POLYSTYRENE RESIN, EXPANDED PARTICLE OF CARBON-CONTAINING MODIFIED POLYSTYRENE RESIN, MOLDED FOAM OF CARBON-CONTAINING MODIFIED POLYSTYRENE RESIN, AND PROCESSES FOR PRODUCING THESE

摘要

Carbon-containing modified polystyrene resin particles which contain a carbon-containing polypropylene resin and contain a polystyrene resin in an amount of 100-400 parts by mass, excluding 400 parts by mass, per 100 parts by mass of the carbon-containing polypropylene resin. The polystyrene resin proportion in a central part of each particle as calculated from the ratio between absorbances at 698 cmand 1,376 cm(D/D) obtained from an infrared absorption spectrum for the central part in infrared spectroscopic analysis by the ATR method is at least 1.2 times the polystyrene resin proportion in the whole particle.