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This article reports on sample preparation, characterization, CO2 sorption behavior, and foaming of blends of poly L-lactic acid (PLLA) and poly methyl methacrylate (PMMA) in compositions of 75/25, 50/50, and 25/75 wt.%. The crystallization and thermal decomposition behavior of the polymer blends were found to be dependant on concentration of PLLA in the samples. Annealing the specimens in air at 90°C for 24 h resulted in complete recrystallization in the 75/25 and 50/50 wt.% samples. Detailed studies on the sorption kinetics of CO2 in the prepared blend samples indicated gas solubilities to be comparable to those observed in neat PMMA, however, foam morphologies significantly improved in the blends when compared to neat PLLA.

Spray pyrolysis deposition is a cost-effective process to deposit films of a wide variety of materials, especially solid oxides. In this study, spray pyrolysis deposition was used to deposit 2-3 μm thick Mn1.5Co1.5O4 spinel and Ta2O5-doped CeO2 on a ferritic stainless steel as protective coatings on SOFC interconnect. The coated samples were exposed to air at 1000oC to study the diffusion and oxidation behaviours. Characterization results indicated that the coatings are dense, have good adhesion to the substrate, and are stable and effective to prevent Cr outward diffusion at the high temperature.

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R e p r o d u c e d with p e r m issio n o f th e co p y rig h t o w n e r. F u rth er rep ro d u ctio n p roh ib ited w ith o u t p e r m issio n .