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Synthesis of sago starch laurate in densified carbon dioxide
Author(s) -
Muljana Henky,
Irene Cynthia,
Saptaputri Vina,
Arbita Ernest,
Sugih Asaf K.,
Heeres Hero J.,
Picchioni Francesco
Publication year - 2018
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24569
Subject(s) - starch , crystallinity , materials science , crystallization , chemical engineering , carbon dioxide , solvent , organic chemistry , composite material , chemistry , engineering
Fatty acid starch esters are potential candidates for novel biodegradable plastics. This work describes a systematic study on the synthesis of starch laurate using sago starch and vinyl laurate (VL) in densified CO 2 as a green solvent. The phase behavior of the CO 2 –VL system was investigated in a high pressure view cell and the critical point of the CO 2 ‐VL mixtures was shown to increase with temperature. Within the experimental window, sago starch laurate with a maximum degree of substitution (DS) of 0.97 is obtained. To the best of our knowledge, such high DS values have never been reported before for reactions in densified CO 2 . Moreover, the presence of laurate chains in the starch backbone has a profound influence on the degree of crystallinity, the melt and crystallization temperature, and the degradation temperature of the final products. POLYM. ENG. SCI., 58:291–299, 2018. © 2017 Society of Plastics Engineers