1-dimensional crystallization of polycarbonate by rapid thermal quenching with entropy diluent
발표자
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초록
내용
Recently, crystallization of stereo-irregular atactic-PMMA with entropy diluent was reported, providing unique 1-D structure and strong mechanical property. Hypo-crystalline poly (bisphenol-A carbonate) (hc-PC) was similarly prepared by rapid thermal quenching process using benzoic acid as entropy diluent. Also, PC crystals were prepared by precipitation and solvent casting methods for comparison. While precipitation and solvent casting methods follows conventional polymer crystallization resulted to spherulite PC crystal structure, hc-PC exhibits 1-D structure with ordered lateral packing between chains (d = 4.1 and 3.4Å) which is independent from chain conformation and the other two dimension was still amorphous. 1-D hc-PC provides different thermal property that originally shows clear melting transition at 225oC but can be shifted to 285oC by thermal annealing.