MORPHOLOGY OF SINGLE-CRYSTALS OF POLY(HYDROXYBUTYRATE) AND COPOLYMERS OF HYDROXYBUTYRATE AND HYDROXYVALERATE
MORPHOLOGY OF SINGLE-CRYSTALS OF POLY(HYDROXYBUTYRATE) AND COPOLYMERS OF HYDROXYBUTYRATE AND HYDROXYVALERATE
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DOI：
10.1007/bf00356322
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发表时间：
1995-02-01
影响因子：
4.5
通讯作者：
BARHAM, PJ
中科院分区：
文献类型：
--
作者：
BIRLEY, C;BRIDDON, J;BARHAM, PJ
聚（羟基丁酸酯），和羟基丁酸酯和羟基戊酸酯的共聚物的单晶，已从各种溶剂中生长和它们的形态研究。在所有情况下，晶体都是拉长的，晶体学的a轴沿着晶体的长轴。已经观察到螺位错（其作为分支点并且可以导致大的晶体聚集体），并且已经鉴定出溶剂，例如辛醇，其中发生更多的这些位错。用聚乙烯装饰的晶体显示折叠平面是（0 1 0）平面，而结晶学和结晶度参数要求连续相邻折叠是沿沿着[1 1 0]方向。有人认为，折叠是沿着[1 1 0]在顶部，和[1 1 0]在底部表面的晶体。
Single crystals of poly(hydroxybutyrate), and copolymers of hydroxybutyrate and hydroxyvalerate, have been grown from a variety of solvents and their morphology studied. In all cases the crystals appear elongated, with the crystallographic a axis along the long axis of the crystals. Screw dislocations (which act as branch points and can lead to large crystal aggregates) have been observed, and solvents, e.g. octanol in which more of these dislocations occur, have been identified. Decoration of the crystals with polyethylene shows that the fold plane is the (0 1 0) plane, while crystallographic and crystallinity arguments require successive adjacent folds to be along [1 1 0] directions. It is argued that folding is along [1 1 0] on the top, and [1 1 0]on the bottom surface of a crystal.