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oai:www.ideals.illinois.edu:2142/21638 2023-07-10 col_2142_5131 col_2142_13836 com_2142_5130 com_2142_13835 com_2142_234

1993 Stupp, Samuel I. Messersmith, Phillip Byron 2011-05-07T13:14:39Z 2011-05-07T13:14:39Z 10000-01-01 This manuscript describes the synthesis and characterization of novel polymer-ceramic nanocomposites (organoceramics) based on various water soluble polymers and calcium aluminate hydrates. Synthesis of these materials involves the aqueous precipitation of the inorganic crystals in the presence of polymer. The presence of polymer during crystallization often leads to changes in particle morphology, and in some cases intercalation. The organoceramics based on poly(vinyl alcohol) (PVA) and $\rm CaO{\cdot} Al\sb2O\sb3{\cdot} 10H\sb2O$ (CAH$\sb{10})$ were found to exhibit retarded phase transformation kinetics and unique particle morphologies. Intercalation of PVA between layers of $\rm\lbrack Ca\sb2Al(OH)\sb6\rbrack\sp+\lbrack(OH){\cdot} 3H\sb2O\rbrack\sp-$ occurred during crystal growth, resulting in an organoceramic containing up to 40% polymer by weight. Polymer intercalation resulted in an expression of the interlayer by approximately 10 A, consistent with the formation of a double layer of PVA chains across each interlayer. Thermal degradation of the inorganic and polymeric components of the organoceramic occurred at higher temperatures than the individual materials. Compressive strength of PVA organoceramic powder compacts was significantly higher than that of $\rm\lbrack Ca\sb2Al(OH)\sb6\rbrack\sp+\lbrack(OH){\cdot} 3H\sb2O\rbrack\sp-$ compacts, possibly reflecting substantial differences in particle morphologies. Made available in DSpace on 2011-05-07T13:14:39Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9314917.pdf: 8578996 bytes, checksum: 7f0493656db2c2441cdfd4b44ee17765 (MD5) Previous issue date: 1993 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:52:12Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:24:00-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9314917 (UMI)AAI9314917 http://hdl.handle.net/2142/21638 eng Copyright 1993 Messersmith, Phillip Byron Chemistry, Polymer Engineering, Materials Science Synthesis and characterization of novel polymer-ceramic nanocomposites: Organoceramics text Materials Science and Engineering Materials Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.