Independent Control of Elastomer Properties through Stereocontrolled Synthesis.

Independent Control of Elastomer Properties through Stereocontrolled Synthesis.
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通过立体控制合成实现弹性体性能的独立调控

DOI:
10.1002/anie.201606750
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发表时间:
2016-10-10
影响因子:
16.6
通讯作者:
Dove, Andrew P.
Dove, Andrew P.
中科院分区:
化学1区
文献类型:
--
作者:
Bell, Craig A.;Yu, Jiayi;Barker, Ian A.;Truong, Vinh X.;Cao, Zhen;Dobrinyin, Andrey V.;Becker, Matthew L.;Dove, Andrew P.

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在大多数合成弹性体中,通过单体选择改变物理性质也会导致材料结晶度的变化,这通过改变其机械性能表现出来。使用有机催化的立体定向加成硫醇活化的炔,高摩尔质量的弹性体通过逐步增长聚合分离。由此产生的可控双键立体化学定义了结晶度和伴随的机械性能,并使得能够通过改变单体组成来合成保持其优异机械性能的材料。使用这种方法合成弹性体,通过硫化策略进行进一步的端基改性和增韧也是可能的。立体化学的有机催化控制开辟了一个新的领域,易于扩展的一类弹性体,将具有独特的化学处理功能化和合成后处理。
In most synthetic elastomers, changing the physical properties by monomer choice also results in a change to the crystallinity of the material, which manifests through alteration of its mechanical performance. Using organocatalyzed stereospecific additions of thiols to activated alkynes, high‐molar‐mass elastomers were isolated via step‐growth polymerization. The resulting controllable double‐bond stereochemistry defines the crystallinity and the concomitant mechanical properties as well as enabling the synthesis of materials that retain their excellent mechanical properties through changing monomer composition. Using this approach to elastomer synthesis, further end group modification and toughening through vulcanization strategies are also possible. The organocatalytic control of stereochemistry opens the realm to a new and easily scalable class of elastomers that will have unique chemical handles for functionalization and post synthetic processing.
无金属炔烃聚氢硫醇化:通过区域选择性硫代点击聚合合成具有高立构规整性的功能性聚(亚乙烯基硫醚)
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