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Highly crystalline, heat resistant and biodegradable copolyesters from fully bio-based bis(pyrrolidone) monomer
- Source :
- Giant, Vol 18, Iss , Pp 100276- (2024)
- Publication Year :
- 2024
- Publisher :
- Elsevier, 2024.
-
Abstract
- Improving the heat resistance of bio-based and biodegradable polyesters is of great significance to extend their applications. Herein, N,Nā-trans-1,4-cyclohexane-bis(pyrrolidone-4-methyl carboxylate) (T-CBPMC) was prepared through efficient Michael-addition reaction between dimethyl itaconate and trans-1,4-cyclohexanediamine. The obtained T-CBPMC was copolymerized into aliphatic poly(butylene succinate) (PBS), and a series of PBSPs copolymers with T-CBPMC (BP) molar percentages between 41ā80 mol % and weight average molecular weight (Mw) values ranging between 5.77*104 and 6.67*104 g/mol were prepared. BP units efficiently facilitated the melting temperature (203-251 °C) and isothermal-crystallization rate (t1/2 < 20 s) of PBSPs, endowing the highest heat resistance among commercial biodegradable polyesters, which helps maintain stable in pasteurization, high-temperature disinfection, and microwave environments. Moreover, these copolymers displayed remarkable mechanical, gas barrier properties and degradability. PBSP40-PBSP60 obtained high elastic modulus (335ā872 MPa) and tensile strength (24.7ā31.5 MPa), and good toughness simultaneously. Multiple-ring structures and large steric hindrance of BP units resulted in superior O2 barrier performance than that of non-degradable PET films. Importantly, the PBSP copolyesters showed obvious degradation in water environments and relatively better enzymatic degradation. It was interesting to find that even with 70 % of the BP units, the PBSP copolyesters still retained hydrolysis ability. The resulting PBSP copolyesters open the way for alternative candidates of biodegradable packaging materials with rapid crystallization, high heat-resistance and gas barrier.
Details
- Language :
- English
- ISSN :
- 26665425
- Volume :
- 18
- Issue :
- 100276-
- Database :
- Directory of Open Access Journals
- Journal :
- Giant
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.337163d98a54258b745a8fe3ebaead1
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.giant.2024.100276