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- W3112949609 abstract "Abstract Development of polyurethanes (PU) has come a long way from their origin in 1937 and has unique applications in a diverse set of fields. Recent PU developments are focusing more on the naturally‐derived diols in the synthesis process in an effort to make them more environmentally friendly. In this study, three different diisocyanates (aliphatic, cycloaliphatic, and aromatic diisocyanates) were combined with laccol, which extracted from Vietnamese lacquer sap ( Toxicodendron succedanea ) to synthesize novel PUs. Influence of the different diisocyanates in novel PUs, hydrogen bonding capability, and crosslinking ability were investigated to provide a broader characteristic scope for future developments. Resulting materials illustrated good thermal stability after exposed to higher temperatures and the hydrogen bonding regions corresponding to NH (3326 cm −1 ) and CO (1652 cm −1 ) groups were shifted to higher wavenumber according to Fourier transform infra‐red spectroscopy analysis. Further curing occurred with temperature treatment and improved the overall quality of novel PUs. Powder X‐ray analysis, micro hardness, and swelling analysis were utilized to identify molecular packing and crosslinking effects. Higher crosslink density observed for cycloaliphatic and aromatic diisocyanate incorporated novel polyurethanes compared to aliphatic diisocyanate incorporated polyurethane." @default.
- W3112949609 created "2020-12-21" @default.
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- W3112949609 date "2020-12-14" @default.
- W3112949609 modified "2023-09-24" @default.
- W3112949609 title "Synthesis and characterization of novel laccol based polyurethanes" @default.
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- W3112949609 doi "https://doi.org/10.1002/pen.25608" @default.
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