Novel functional polymers: Poly(dimethylsiloxane)polyamide multiblock copolymer. IX. Surface properties blend film of aramid-silicone resins with aramid

A blending technique was studied in order to widen the applications of aram id-silicone multiblock copolymer (PAS). A PAS/aramid blend film was prepare d and the characterization of the surfaces was investigated. The two-phase nature of poly(dimethylsiloxane) (PDMS) and the aromatic polyamide (aramid) multiblock copolymer (PAS) were clarified in part by evaluating the surfac e enrichment in PAS/aramid blend films. There were no significant differenc es among the PASs as additives; however, the PASs were able to alter the ar amid surface to that of silicone, even though they were used at low concent ration. The atomic force microscopy observation suggested that the mobility of the silicone segment that existed on the surface was restricted by the associated aramid segments. (C) 2000 John & Wiley & Sons, Inc.