Sodium hydride

Chitosan with a 90% deacetylation degree and a viscosity of 8 mPa s (1%, 20 °C) was purchased from Weifang Haizhiyuan Biological Product Co., Ltd., (Shandong, China). Polypropylene carbonate diol (HO-PPC-OH, M_n = 2500) was provided by Dazhi Environmental Protection Technology Co., Ltd. (Guangdong, China), Sodium hydride (60% dispersion in mineral oil), toluene and (±)-epichlorohydrin were purchased from Sinopharm Chemical Reagent Co., Ltd (China). Yeast, peptone and agar were purchased from Aladdin Reagent Co., Ltd. (Shanghai, China). The chemicals were used directly without further purification.

Butyl rubber (IRR1751) was obtained from SINOPEC BEIJING YANSHAN COMPANY. Stearic acid, zinc oxide (ZnO), Tetramethylthiuram disulfide (TMTD, AR), 2,2′-Dithiobis (DM, AR), sulfur powder (S, CP), sodium hydride (NaH), Phenol (99.0wt%), formaldehyde solution (37% wt% in H₂O), Lignin (Alkaline), dibenzyl ketone (DBA) were purchased from Sinopharm Chemical Reagent Co., Ltd. Montmorillonite was purchased from Hebei Hongyao Mineral Processing Co. The chemical materials were used without any purification. The homemade lignin-based phenolic resin was prepared by our subject group.