| 摘要 |
PURPOSE:To obtain the titled material having excellent strength, etc., high shape-restoration characteristics by heat treatment and excellent moldability, by compounding a crystalline block copolymer containing a specific triblock chain or star-structure in a polymer chain with a specific amount of a crystalline polymer having low melting point. CONSTITUTION:The objective material can be produced by compounding (I) 97-30wt.% crystalline block copolymer containing a triblock chain or star- structure expressed by formula A-B-C (A and C are blocks consisting of homopolymer or copolymer of a vinyl aromatic compound and having a glass transition temperature of >=50 deg.C and a weight-average molecular weight of 2,000-100,000; B is a block consisting of homopolymer or copolymer of a conjugated diene compound and having a glass transition temperature of <=10 deg.C, a weight-average molecular weight of 25,000-1,000,000 and a 1,4-trans-bond content of >=80% in the conjugated diene part) and (II) 3-70% low-melting crystalline polymer having a melting point of 25-150 deg.C and a molecular weight of 500-500,000. |
