NDLI: Drying dissipative patterns of aqueous solution of poly(methacrylic acid) and its salt neutralized half

Content Provider	Springer Nature Link
Author	Okubo, Tsuneo Hagiwara, Akira Kita, Hiromi Takahashi, Shinya Tsuchida, Akira
Copyright Year	2015
Abstract	Drying patterns of poly(methacrylic acid) (HPMA) and its salt neutralized half with sodium hydroxide (NaHPMA) were studied on a cover glass, a watch glass, and a glass dish. The patterns of HPMA and NaHPMA are compared with the previous observation of sodium salt of poly(methacrylic acid), NaPMA (Okubo et al. Colloid Polym Sci 287:1155–1165, 2009). HPMA and especially NaHPMA are hygroscopic, and only the macroscopic patterns were observed. However, microscopic patterns were not observed clearly especially for NaHPMA in the room atmosphere. The hygroscopy of the dried films was in the order NaPMA < HPMA < NaHPMA. Broad rings of HPMA formed only at the outside edge irrespective of polymer concentration. Simplified laurel crown-like patterns appeared on a cover glass, which supports the strong solute–substrate affinity. On the other hand, the broad ring size of NaHPMA decreased sharply at the lower polymer concentrations than the critical concentration, m*. The results of NaHPMA support that both the inter-solutes and solute–substrate affinity are rather weak, and the pattern size was determined with the excluded volume effects. Sharpness parameter, S, of the broad rings was in the order HPMA > NaHPMA > NaPMA. The magnitude of S values of NaPMA was similar to that of poly(ethylene glycol) (PEG). HPMA, NaHPMA, and NaPMA were grouped into E, A, and A, respectively, among six groups of solutes A to F.
Starting Page	2137
Ending Page	2146
Page Count	10
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	293
Issue Number	8
e-ISSN	14351536
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-04-28
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Poly(methacrylic acid) (HPMA) Laurel crown pattern Drying pattern Broad ring pattern Hygroscopic polymer Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry Food Science Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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