Amplifying (Im)perfection: The Impact of Crystallinity in Discrete and Disperse Block Co-oligomers.

Amplifying (Im)perfection: The Impact of Crystallinity in Discrete and Disperse Block Co-oligomers.
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DOI:
10.1021/jacs.7b08627
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发表时间:
2017-10-25
影响因子:
15
通讯作者:
Meijer EW
Meijer EW
中科院分区:
化学1区
文献类型:
--
作者:
van Genabeek B;Lamers BAG;de Waal BFM;van Son MHC;Palmans ARA;Meijer EW

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结晶性很少被用作超低分子量嵌段共聚物中微相分离过程的一部分。在这里,我们示出了两种类型的离散的半结晶嵌段共聚低聚物的制备,包括无定形低聚二甲基硅氧烷嵌段和结晶低聚-1-乳酸或低聚亚甲基嵌段。这些离散材料的自组装导致层状结构,其畴间距具有不可预见的均匀性。分散性的系统介绍揭示了极端的敏感性的微相分离过程对链长分散性的结晶块。
Crystallinity is seldomly utilized as part of the microphase segregation process in ultralow-molecular-weight block copolymers. Here, we show the preparation of two types of discrete, semicrystalline block co-oligomers, comprising an amorphous oligodimethylsiloxane block and a crystalline oligo-l-lactic acid or oligomethylene block. The self-assembly of these discrete materials results in lamellar structures with unforeseen uniformity in the domain spacing. A systematic introduction of dispersity reveals the extreme sensitivity of the microphase segregation process toward chain length dispersity in the crystalline block.
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发表时间: 1991-01-01
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