An evident macro-phase separation between SEBS and PMMA blend and a micro-phase separation in SEBS copolymer were observed simultaneously in the blend film spin-coated from chloroform solvent.

• 结果表明，用共混物的氯仿溶液旋转涂膜，可见明显的共混物的宏观相分离和SEBS的微观相分离形态。