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Poly[(R)-lactate-co-(R)-3-hydroxybutyrate] [P(LA-co-3HB)] is a biobased polyester with flexible properties efficiently synthesized by engineered Escherichia coli. Here, we aimed at optimizing the monomeric composition of the copolymer in terms of its flexibility, and elucidating structural features contributing to their mechanical properties. The LA fraction was successfully regulated in the range...
The surface dynamics of polyhedral oligomeric silsesquioxane (POSS)-functionalized polystyrene (PS-POSS) thin films above the glass transition temperature were studied by grazing-incidence X-ray photon correlation spectroscopy in order to elucidate the effects of POSS at the end of the polystyrene chains. Much slower fluctuations were observed in the surface of PS-POSS thin films than in the polystyrene...
In this study, we prepared two types of drawn films of poly[(R)-3-hydroxybutyrate], a microbial polyester: those containing only α-crystals and those containing both α- and β-crystals. Real-time wide-angle X-ray diffraction (WAXD) and real-time small-angle X-ray scattering (SAXS) measurements were performed during heating using synchrotron X-rays, along with high-speed differential scanning calorimetry...
Crystalline/crystalline binary blend films of microbial polyesters composed of poly[(R)-3-hydroxybutyrate-co-(R)-3hydroxyhexanoate] (P(3HB-co-3HH)) and poly[(R)-3-hydroxybutyrate] (P(3HB)) that exhibit a morphological change are prepared by solvent casting. Differential scanning calorimetry measurements indicate that P(3HB-co-3HH) and P(3HB) are miscible for all blend ratios because a single glass...
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