受热到一定程度就能软化的高聚物主要是(    ) A.相对分子质量较大

受热到一定程度就能软化的高聚物主要是(    )

A.相对分子质量较大的高聚物                B.分子结构复杂的高聚物

C.体型结构的高聚物                            D.线型结构的高聚物

答案

解析:线型结构的高分子,具有热塑性,受热时,先软化,后变成流动的液体。

答案:D

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