Trimethylolpropane

Polycarbonate diol (PCDL, purity > 95%, M_n ~ 1000) was procured from Shanghai Huihua Industrial Co., Ltd., Shanghai, China. Isophorone diisocyanate (IPDI, purity > 99.5%, NCO% ≥ 37.5%) was supplied by Bayer Chemicals (Leverkusen, Germany). Dodecafluoroheptyl methacrylate was purchased from Shangfu Technology Co., Ltd., Shanghai, China. N-methyldiethanolamine (MDEA, ≥99.5%), 1,4-butanediol (BDO, ≥99.5%), methyl methacrylate (MMA, ≥99.5%), hydroxyethyl methacrylate (HEMA, ≥96%), trimethylolpropane (TMP, ≥99.5%), and dibutyltin dilaurate (DBTDL, ≥99.5%) were purchased from Macklin Inc., Shanghai, China. Dihydrazide adipate (ADH, ≥98%) and 2,6-tert-butyl-p-cresol (BHT, ≥99.5%) was supplied by Aladdin Reagent Co., Ltd., Shanghai, China. Glacial acetic acid (HAc, ≥90%) and ammonium persulfate (APS, ≥99%) were purchased from Shanghai Lingfeng Chemical Reagent Co., Ltd., Shanghai, China. Deionization is homemade in the laboratory. All the other reagents underwent further purification.

All chemical reagents used in the synthesis were commercially purchased. Among them, isophorone diisocyanate (IPDI) and trimethylolpropane (TMP) were purchased from Shanghai Macklin Biochemical Technology Co., Ltd. (Shanghai, China). Additionally, butane-1,4-diol (BDO) and polytetramethylene glycol (PTMG, M_w = 1000 g·mol⁻¹) were provided by Shanghai Aladdin Biochemical Technology Co., Ltd. (Shanghai, China). Toluene was purchased from Sichuan Xilong Scientific Co., Ltd. (Chengdu, China). Catalyst and defoaming agent were provided by Guangzhou Yourun Synthetic Material Co., Ltd. (Guangzhou, China).