問答題

試述下列烯類高聚物的構型特點及其名稱。式中D表示鏈節(jié)結構是D構型,L是L構型。 
(1) -D-D-D-D-D-D-D- 
(2) -L-L-L-L-L-L-L- 
(3) —D-L-D-L-D-L-D-L-
(4) —D-D-L-D-L-L-L-


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