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首页> 外文期刊>Journal of Applied Polymer Science >Properties of crosslinked blends of pellethene and multiblock polyurethane containing poly(ethylene oxide) for biomaterials
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Properties of crosslinked blends of pellethene and multiblock polyurethane containing poly(ethylene oxide) for biomaterials

机译：颗粒物和含聚环氧乙烷的多嵌段聚氨酯交联共混物的生物材料性能

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A series of multiblock polyurethanes, containing various poly(ethylene oxide) (PEO; number-average molecular weight = 400-3400) contents (0-80 wt %) and prepared from hexamethylene diisocyanate / PEO/poly(dimethylsiloxane) diol/polybutadiene diol/1,4-butanediol, were used as modifying additives (30 wt %) to improve the properties of biomedical-grade Pellethene. Different molecular weights of PEO were used to keep poly(ethylene glycol) at a fixed molar content, if possible, although the PEO content, related to the PEO block length in the multiblock polyurethanes, was varied from 0 to 80 wt %. The hydrophilic PEO component was introduced through the addition of PEO-containing polyurethanes and dicumyl peroxide as a crosslinking agent in a Pellethene matrix. As the PEO content (PEO block length) increased, the hydrogen-bonding fraction of the crosslinked Pellethene/multiblock polyurethane blends increased, and this indicated an increase in the phase separation with an increase in the PEO content in the crosslinked Pellethene/multiblock polyurethane blends. According to electron spectroscopy for chemical analysis, the ratio of ether carbon to alkyl carbon in the crosslinked Pellethene/multiblock polyurethane blends increased remarkably with increasing PEO content. The water contact angle of the crosslinked Pellethene/multiblock polyurethane blend film surfaces decreased with increasing PEO content. The water absorption and mechanical properties (tensile modulus, strength, and elongation at break) of the crosslinked Pellethene/multiblock polyurethane blend films increased with increasing PEO content. The platelet adhesion on the crosslinked Pellethene/multiblock polyurethane blend film surfaces decreased significantly with increasing PEO content. These results suggest that crosslinked Pellethene/multiblock polyurethane blends containing the hydrophilic component PEO may have potential for biomaterials that come into direct contact with blood. (C) 2003 Wiley Periodicals, Inc. [References: 29]
机译：由六亚甲基二异氰酸酯/ PEO /聚二甲基硅氧烷二醇/聚丁二烯二醇制得的一系列多嵌段聚氨酯，包含各种聚环氧乙烷（PEO;数均分子量= 400-3400）（0-80重量％） / 1,4-丁二醇用作改性添加剂（30 wt％），以改善生物医学级皮烯的性能。尽管可能，尽管与多嵌段聚氨酯中的PEO嵌段长度相关的PEO含量在0至80wt％之间变化，但是使用不同分子量的PEO将聚乙二醇保持在固定的摩尔含量。通过在Pellethene基质中添加含PEO的聚氨酯和过氧化二枯基过氧化物作为交联剂，引入亲水性PEO组分。随着PEO含量（PEO嵌段长度）的增加，交联的Pellethene /多嵌段聚氨酯共混物的氢键分数增加，这表明相分离随着交联的Pellethene /多嵌段聚氨酯共混物中PEO含量的增加而增加。 。根据用于化学分析的电子光谱，在交联的Pellethene /多嵌段聚氨酯共混物中，醚碳与烷基碳的比率随着PEO含量的增加而显着增加。交联的Pellethene /多嵌段聚氨酯共混物膜表面的水接触角随PEO含量的增加而降低。交联的Pellethene /多嵌段聚氨酯共混物薄膜的吸水率和机械性能（拉伸模量，强度和断裂伸长率）随PEO含量的增加而增加。随着PEO含量的增加，交联的Pellethene /多嵌段聚氨酯共混物膜表面上的血小板粘附力显着降低。这些结果表明，含有亲水性组分PEO的交联的Pellethene / multiblock聚氨酯共混物可能具有与血液直接接触的生物材料的潜力。 （C）2003 Wiley Periodicals，Inc. [参考：29]

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