Segmented Polyurethane(分段聚氨酯)研究综述
Segmented Polyurethane 分段聚氨酯 - Simultaneously, the mechanical benefits of segmented polyurethanes are exploited. [1] Segmented polyurethanes based on 2 kDa poly(tetramethylene oxide) (PTMO) and 4,4‐methylenebis(cyclohexyl isocyanate) were polymerized using a two‐step process in which 2,6‐bis(1‐ethyl‐5‐(methoxymethyl)‐1H‐benzo[d]imidazol‐2‐yl)pyridine was added as a chain extender. [2] Segmented polyurethanes based on polycaprolactone, 4,4 (metylene-bis-cyclohexyl) isocyanate, and l-lysine were synthesized, manufactured as small vascular grafts and characterized according to ISO 7198 standard for cardiovascular implants-tubular vascular prosthesis. [3] In this report, non-hydrogen bonded, segmented polyurethane (SPU) of ferrocene functionalized polybutadiene diol has been synthesized and studied in depth to understand the role of ferrocene moiety in the structure-property relationship of SPU. [4] The segmented polyurethane (SPU) films were prepared by the solvent casting method and the porous SPU membranes were prepared by electrospinning. [5] Segmented polyurethanes were synthesized by the reactions of poly($\varepsilon $-caprolactone) (PCL)-diol and 1,6-hexamethylene diisocyanate through bulk polymerization without using solvent, initiator, or catalyst. [6] The transformation of hydroxyl functional groups from bisphenols to alkoxylated alcohols increased the reactivity of their hydroxyl groups toward isocyanates, as evidenced by achieving >3 times higher molecular weights of the segmented polyurethanes (PUs) in GPC analysis using alkoxylated diols as chain extenders instead of bisphenols. [7]同时，利用了分段聚氨酯的机械优势。 [1] 基于 2 kDa 聚四亚甲基氧 (PTMO) 和 4,4-亚甲基双(环己基异氰酸酯) 的分段聚氨酯采用两步法聚合，其中 2,6-双(1-乙基-5-(甲氧基甲基)-添加 1H-苯并[d]咪唑-2-基）吡啶作为扩链剂。 [2] 合成基于聚己内酯、4,4（亚甲基-双-环己基）异氰酸酯和 l-赖氨酸的分段聚氨酯，制造为小血管移植物，并根据心血管植入物-管状血管假体的 ISO 7198 标准进行表征。 [3] 在本报告中，合成并深入研究了二茂铁官能化聚丁二烯二醇的非氢键嵌段聚氨酯 (SPU)，以了解二茂铁部分在 SPU 结构-性能关系中的作用。 [4] 通过溶剂流延法制备分段聚氨酯（SPU）薄膜，并通过静电纺丝制备多孔SPU膜。 [5] 分段聚氨酯是通过聚($\varepsilon $-己内酯) (PCL)-二醇和1,6-六亚甲基二异氰酸酯在不使用溶剂、引发剂或催化剂的情况下通过本体聚合反应合成的。 [6] 羟基官能团从双酚到烷氧基化醇的转变增加了它们的羟基对异氰酸酯的反应性，这可以通过在 GPC 分析中使用烷氧基化二醇而不是双酚作为扩链剂实现链段聚氨酯 (PU) 的 3 倍以上的分子量来证明. [7]