The melting and non-isothermal melt-recrystallization behaviour of poly(vinylcyclohexane)-b-poly(ethylene)-b-poly(vinylcyclohexane)(PVCH-b-PE-b-PVCH) solution crystallized sample

which was obtained after isothermal solution crystallization

were investigated by means of DSC.It was found that different with the PVCH-b-PE-b-PVCH melt crystallized sample

the solution crystallized sample possessed a higher melting temperature in the heating process and multiple crystalline peaks in the non-isothermal melt-recrystallization process.In the solution crystallization step of the solution crystallized sample

due to the dissolution of PVCH blocks in p-xylene the extent of the PE confined crystallization is reduced

forming more perfect PE crystals

and thus the melting temperature is higher than that of the melt crystallized sample.On the same time

the crystallization of PE blocks in solution also causes respective aggregation of PE and PVCH blocks

accordingly an initial microphaseseparated structure is formed.The segment mobility of PE blocks is relatively improved in the initial microphase-separated structure

resulting in the partially confined crystalline peak crystalline peak Ⅱ and the completely confined crystalline peak at low temperature crystalline peak Ⅲ.From the comparison of the slow cooling experiment and the quenching experiment

it was found that crystalline peak Ⅰ at high temperature related to the microphaseseparated ordered structure of the block copolymer.The formation of the ordered structure induces the further aggregation of PE blocks

improving the PE crystallization

and thus PE blocks could crystallize at the high temperature.The confined crystallization behavior of the block copolymer is influenced by the microphaseseparated structures of the block copolymer

resulting in non-isothermal multiple crystalline peaks of the PVCH-b-PE-b-PVCH solution crystallized sample.The corresponding relation between the phase structures and the multiple crystalline peaks was discussed

and the formation reason of the non-isothermal multiple crystalline peaks was further clarified.