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首页> 外文期刊>繊維学会誌 >Fabrication of Rod-like Crystals of Poly(p-oxycinnamoyl) by Hydrodynamically Induced Crystallization during Solution Polymerization
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Fabrication of Rod-like Crystals of Poly(p-oxycinnamoyl) by Hydrodynamically Induced Crystallization during Solution Polymerization

机译：溶液聚合过程中水动力诱导结晶法制备聚对氧肉桂酰基棒状晶体

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摘要

Microspheres of poly(p-oxycinnamoyl) (POC) were obtained by the polymerization of (E)-4-acetoxycinnamic acid in aromatic solvent at 320℃ and a concentration of 1.5% without stirring via liquid-liquid phase separation of oligomers. In contrast to this, rod-like crystals were formed under shearing with more than 700 rpm. The obtained rod-like crystals were 10-15 urn in length and 1.0-1.5 urn in width having many thorns on the surface. The critical stirring speed for the onset of Taylor vortices was in agreement with 700 rpm and the crystallization of oligomers was hydrodynamically induced by the generation of Taylor vortices affording the rod-like crystals. Stirring influenced the morphology of POC significantly and this work provided a new procedure for the fabrication of fine fibers of intractable aromatic polymers.
机译：通过（E）-4-乙酰氧基肉桂酸在芳香族溶剂中于320℃，浓度为1.5％的条件下不经搅拌下通过液-液相分离的方法进行聚合，得到聚对氧肉桂酸微球。与此相反，在大于700 rpm的剪切下形成棒状晶体。所得的棒状晶体的长度为10〜15μm，宽度为1.0〜1.5μm，表面有许多刺。泰勒涡旋开始的临界搅拌速度与700 rpm一致，并且通过生成棒状晶体的泰勒涡旋在流体力学上诱导了低聚物的结晶。搅拌显着影响了POC的形貌，这项工作为难处理的芳族聚合物细纤维的制备提供了新的程序。

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