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Characterization of poly(vinyl pyrrolidone-co-isobutylstyryl polyhedral oligomeric silsesquioxane) nanocomposites

机译:聚(乙烯基吡咯烷酮-异丁基苯乙烯基多面体低聚倍半硅氧烷低聚物)纳米复合材料的表征

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Poly(vinyl pyrrolidone-co-isobutyl styryl polyhedral oligomeric silsesquioxane)s (PVP-POSS) were synthesized by one-step polymerization and characterized 13 using FTIR, high-resolution H-1-NMR, solid-state C-13-NMR, Si-29-NMR, GPC, and DSC. The POSS content can be controlled by varying the POSS feed ratio. The T-g of the PVP-FOSS hybrid is influenced by three main factors: (1) a diluent role of the POSS in reducing the self-association of the PVP; (2) a strong interaction between the POSS siloxane and the PVP carbonyl, and (3) physical aggregation of nanosized POSS. At a relatively low FOSS content, the role as diluent dominates, resulting in a decrease in T-g. At a relatively high POSS content, the last two factors dominate and result in T-g increase of the PVP-POSS hybrid. (C) 2003 Wiley Periodicals, Inc. [References: 17]
机译:聚(乙烯基吡咯烷酮-异丁基苯乙烯基多面体低聚倍半硅氧烷)(PVP-POSS)通过一步聚合合成,并用FTIR,高分辨率H-1-NMR,固态C-13-NMR表征13 Si-29-NMR,GPC和DSC。可以通过改变POSS进料比来控制POSS含量。 PVP-FOSS杂化物的T-g受三个主要因素影响:(1)POSS在减少PVP的自缔合中的稀释作用; (2)POSS硅氧烷和PVP羰基之间的强相互作用,以及(3)纳米POSS的物理聚集。在较低的FOSS含量下,稀释剂占主导地位,导致T-g降低。在相对较高的POSS含量下,最后两个因素占主导地位,并导致PVP-POSS杂种的T-g增加。 (C)2003 Wiley Periodicals,Inc. [参考:17]

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