2 4 toluene diisocyanate

The CNC suspension (solid content of 10.4% w/w) was purchased from the University of Maine, which was prepared using sulfuric acid. Acetone, toluene, triethylamine (TEA), ethanol, 1-butanol, 1-hexanol, 1-octanol, and chloroform were purchased from VWR (Darmstadt, Germany) and stored under an A3 or A4 molecular sieve. The molecular sieves were purchased from Carl Roth (Karlsruhe, Germany) and regenerated before use. TCI Chemicals (Eschborn, Germany) provided 2,4-toluene diisocyanate. Bio-based poly(butylene succinate) was purchased from PTTMCC (Bangkok, Thailand) under the commercial name BioPBS ^TM.

CNC suspension (solid content of 10.4% (w/w)) was purchased from the University of Maine (Orono, ME, USA), which was prepared using the sulfuric acid method. Acetone (≥99%), toluene (≥99%), triethylamine (TEA) (≥99%), DMSO (≥99%), chloroform (≥99%), and hydrochloric acid (37%) were purchased from VWR (Darmstadt, Germany). 2,4-toluene diisocyanate (≥98%) was purchased from TCI Chemicals (Eschborn, Germany) and was stored in sealed bottles in the fridge. toluene, TEA, and DMSO were stored over A4 molecular sieve, while Acetone was stored under A3 molecular sieve. Both molecular sieves were purchased from Carl Roth (Karlsruhe, Germany) and regenerated before use.

2,5-Bis(aminomethyl)furan (99% purity) was obtained from Nippon Shokubai Co., Ltd. (Tokyo, Japan). Methylene diphenyl diisocyanate (MDI), 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 1,3-phenylenediisocyanate, 1,4-phenylenediisocyanate, m-xylylene diisocyanate, 1,5-diisocyanatonaphthalene, dicyclohexylmethane 4,4′-diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, and 4,4′-diphenylmethane bismaleimide (BMI) were purchased from Tokyo Chemical Industry Co., Ltd. (Tokyo, Japan) 4,4′-Diisocyanato-3,3′-dimethylbiphenyl and N,N-dimethylacetamide (DMAc) were purchased from Kanto Chemical Co., Inc. (Tokyo, Japan), 1,4-Butane diisocyanate and 1,8-octane diisocyanate were purchased from Sigma-Aldrich Co., Inc., Merk (Darmstadt, Germany). N-Methyl pyrrolidone (NMP), dimethyl sulfoxide (DMSO), N, N-dimethylformamide (DMF), tetrahydrofuran (THF), acetone, chloroform (CHCl₃), dichloromethane (DCM), ethanol (EtOH), m-cresol, trifluoroacetic acid (TFA), and concentrated sulfuric acid (conc. SA) were purchased from Wako Pure Chemical Industries Ltd. (Osaka, Japan) All reagents were used without further purification.