聚己内酯
材料科学
烷基
尿素
化学工程
高分子化学
有机化学
高分子科学
复合材料
聚合物
化学
工程类
作者
Derek C. Batiste,Michaela R. Pfau‐Cloud,Hee Joong Kim,Christopher J. Ellison,Marc A. Hillmyer
标识
DOI:10.1021/acsmacrolett.4c00474
摘要
We report the mechanical performance and chemical recycling advantages of implementing alkyl-substituted poly(ε-caprolactones) (PCLs) as soft segments in thermoplastic poly(urethane-urea) (TPUU) materials. Poly(4-methylcaprolactone) (P4MCL) and poly(4-propylcaprolactone) (P4PrCL) were prepared, reacted with isophorone diisocyanate, and chain-extended with water to form TPUUs. The resulting materials' tensile properties were similar or superior to a commercially available polyester thermoplastic poly(urethane) and had superior elastic recovery properties compared to a PCL analogue due to the noncrystalline nature of P4MCL and P4PrCL. Additionally, monomers were recovered from the TPUU materials in high yields via ring-closing depolymerization using a reactive distillation approach at an elevated temperature and a reduced pressure (240-260 °C, 25-140 mTorr) with zinc chloride (ZnCl
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