Author/Authors :
Liu، نويسنده , , Guoming and Guan، نويسنده , , Yu and Wen، نويسنده , , Tao and Wang، نويسنده , , Xiwei and Zhang، نويسنده , , Xiuqin and Wang، نويسنده , , Dujin and Li، نويسنده , , Xiuhong and Loos، نويسنده , , Joachim and Chen، نويسنده , , Hongyu and Walton، نويسنده , , Kim and Marchand، نويسنده , , Gary، نويسنده ,
Abstract :
The mesophase separation and crystallization as well as the elastomeric properties of olefin multi-block copolymers (OBCs) are studied. The solid state morphologies of the OBCs are determined by the competition between mesophase separation and crystallization of hard blocks. The OBC with lower ΔC8 (octene content difference between soft and hard blocks) displays a spherulitic superstructure, while the OBC with higher ΔC8 exhibits mesophase separation. The two OBCs show very different elastomeric properties. Wide-angle X-ray scattering shows that the two OBCs have different deformation mechanisms. It is proposed that the cooperative deformation of crystalline phase makes an important contribution to the elastomeric properties.
