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- W1981012280 abstract "In recent studies, NMR imaging has been used to investigate the swelling of hydroxypropylmethylcellulose (HPMC) tablets and to determine polymer concentration distributions in the swollen matrix. The total amount of polymer in the system was computed from these distributions and was up to 35% greater than the known weight of HPMC in the tablet. This deviation was traced to the presence of air bubbles in the swollen matrix which occupied a significant volume previously assumed to be occupied by polymer and water. When the air in the tablet was removed by vacuum, the swollen gel contained no evidence of air bubbles and the calculated total polymer weights from the HPMC distributions were equal to the amount of HPMC in the tablet." @default.
- W1981012280 created "2016-06-24" @default.
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- W1981012280 creator A5041805399 @default.
- W1981012280 date "1998-03-01" @default.
- W1981012280 modified "2023-09-26" @default.
- W1981012280 title "Complications in investigations of the swelling of hydrogel matrices due to the presence of trapped gas" @default.
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- W1981012280 doi "https://doi.org/10.1016/s0168-3659(97)00217-4" @default.
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