Characterization of structural knot distributions in UHMWPE fibers

Characterization of structural knot distributions in UHMWPE fibers
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UHMWPE 纤维结构结分布的表征

DOI:
10.1007/s10118-016-1774-8
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发表时间:
2016-02
影响因子:
4.3
通讯作者:
Gu, Qun
Gu, Qun
中科院分区:
化学2区
文献类型:
--
作者:
An, Min-fang;Lv, You;Wang, Zong-bao;Gu, Qun

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对超高分子量聚乙烯(UHMWPE)SIOC和M4纤维的不同结构节点位置进行了微束广角X射线衍射(WAXD)实验。光学显微镜图像显示,SIOC纤维具有竹节状结构节,而M4纤维的结构节分布混乱。WAXD分析表明,M4纤维整体为单斜晶系,而SIOC纤维竹节处的片层取向不同。此外,小角X射线散射(SAXS)结果表明,SIOC纤维中含有均匀分布的shish结构,差示扫描量热法(DSC)结果表明,SIOC纤维的支链少、短,有利于正交-六方相转变。
Microbeam wide-angle X-ray diffraction (WAXD) experiments were carried out at different structural knot positions of SIOC and M4 fibers of ultra-high molecular weight polyethylene (UHMWPE). The optical microscope images revealed that SIOC fiber had bamboo-like structural knots, and M4 fiber had chaotic distribution of structural knots. WAXD patterns showed the monoclinic unit cell in the whole M4 fiber, but different lamellar orientations in the bamboo joint of SIOC fiber. In addition, small-angle X-ray scattering (SAXS) patterns confirmed that the SIOC fiber contained uniform distribution of shish structures, and differential scanning calorimetry (DSC) measurements showed that its less branched and short chains benefited the orthorhombic-hexagonal phase transformation.
DOI: 10.1107/s0021889870006805
发表时间: 1970-01-01
影响因子: 6.1
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