| abstract |
Disclosed is a flexibilized, insulative styrenic polymer foam structure comprising a foam of a polymeric composition of a styrenic polymer greater than 50 percent by weight styrenic monomeric units, the foam having relatively larger primary cells with an average cell size range of about 0.05 to about 1.2 millimeters and relatively smaller secondary cells ranging in cell size from about 5 percent to about 50 percent of the average cell size of the primary cells. The primary and secondary cells constitute at least about 90 percent of the total cell volume within the foam structure. Between 1 and 30 percent by number of the cells have microscopic "pinholes" between them. The presence of the pinholes enhances the flexure of the foam structure. Further disclosed is a method of insulating a surface comprising applying to the surface an insulating panel fashioned from the structure of claim 1. |