Processing of a strong biodegradable poly[(R)-3-hydroxybutyrate] fiber and a new fiber structure revealed by micro-beam X-ray diffraction with synchrotron radiation
Processing of a strong biodegradable poly[(R)-3-hydroxybutyrate] fiber and a new fiber structure revealed by micro-beam X-ray diffraction with synchrotron radiation
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DOI：
10.1002/marc.200400110
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发表时间：
2004-06-07
影响因子：
4.6
通讯作者：
Uesugi, K
中科院分区：
文献类型：
--
作者：
Iwata, T;Aoyagi, Y;Uesugi, K
以超高相对分子质量聚[(R)-3-羟基丁酸酯](P(3HB))为原料，采用冷拉伸和两步拉伸相结合的方法，在室温下制备了拉伸强度高达1.32 Gpa的生物降解聚[(R)-3-羟基丁酸酯](P(3HB))纤维。用同步辐射微束X射线衍射法分析了单丝中分子结构的分布。结果表明，P(3HB)纤维具有与两种分子构象一致的新的芯-鞘结构：鞘区的2(1)螺旋构象和芯区的平面之字形构象。
Biodegradable poly [(R)-3-hydroxybutyrate] (P(3HB)) fibers with high tensile strength of 1.32 GPa were processed from ultra-high-molecular-weight P(3HB) by a method combining cold-drawing and two-step-drawing procedures at room temperature. The distribution of molecular structures in a mono-filament was analyzed by micro-beam X-ray diffraction with synchrotron radiation. It was revealed that the P(3HB) fiber has a new core-sheath structure consistent with two types of molecular conformations: a 2(1) helix conformation in the sheath region and a planar zigzag conformation in the core region.