Synthesis of bio-based poly(oligoethylene glycols-co-isosorbide carbonate)s with high molecular weight and enhanced mechanical properties via ionic liquid catalyst was written by Li, Chenhao;Zhang, Zhencai;Yang, Zifeng;Fang, Wenjuan;An, Hongzhe;Li, Tao;Xu, Fei. And the article was included in Reactive & Functional Polymers in 2020.Reference of 102-09-0 The following contents are mentioned in the article:
As a kind of bio-based platform chems. derived from renewable resource glucose, isosorbide (ISB) is considered the perfect candidate for the synthesis of polycarbonate (PC) to replace chronic toxic bisphenol A (BPA) due to its attractive rigidity, non-toxicity and chirality. However, synthesis of poly(isosorbide carbonate) (PIC) with high mol. weight and excellent mech. properties is one of tremendous challenges due to low internal hydroxyl group activity and poor structural flexibility of ISB. Herein, we developed a new series of ISB-based copolycarbonates with intriguing properties through incorporating flexibility moiety oligoethylene glycols (OEG) into PIC. By employing bifunctional 1-butyl-3-methylimidazolium lactate IL catalyst, copolycarbonates with high weight-average mol. weight ranging from 94,700 to 146,200 were synthesized via efficient dual activation effect on the carbonyl group in di-Ph carbonate and the hydroxyl group in ISB. Among of them, poly(diethylene glycol-co-isosorbide carbonate) (PDIC) possessed excellent mol. flexibility and showed the best mech. performance with average value of the elongation at break as high as 160%, which was eight times more than PIC prepared (18%) and much higher than the com. BPA-based PC (around 100%). Simultaneously, PDIC showed a 1.25-fold higher tensile strength (80 MPa) than that of BPA-based PC with 63 MPa. This implied that bio-derived copolycarbonates developed in this research effectively enhanced the ductility and processability of PIC and possessed enormous prospect for the industrial application. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Reference of 102-09-0).
Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Reference of 102-09-0
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics