21 下列何種型態的聚合鏈 (polymer chain),有利於樹脂結晶的產生?
(A)長且具側支鏈 (long, branched)
(B)無旁功能基 (side groups)
(C)共聚合物 (copolymer)
(D)含有塑型劑 (plasticizer)
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統計: A(99), B(89), C(54), D(14), E(0) #2229315
統計: A(99), B(89), C(54), D(14), E(0) #2229315