The effect of composition and the introduction of positive charge group (?N(CH3)2) on the multiphase morphology of polyurethane/polyacrylates interpenetrating polymer networks

Yu, Xiaoqiang; Wang, Jing‐Yuan; Gao, Ge; Tang, Jun; Li, Feng; Zhang, Jidong; Tang, Xinyi

doi:10.1002/(sici)1097-4628(19991121)74:8<1898::aid-app3>3.0.co;2-e

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…This means that extensive interpenetration occurred between the two components and nanosilica dispersed homogenously in the PU/EP IPNs. The compatibility11 of this system was improved greatly. This result concurs with conclusions from the dynamic mechanical spectrum.…”

Section: Resultsmentioning

confidence: 96%

“…With a suitable ratio of matrix and nanoparticles, the peak of glass temperature ( T g ) of composites was widened. The glass transition region of nanocomposites min 7% (w/w) of nanosize silicon dioxide was the broadest, which was applicable for damped materials 11. With this ratio, the degree of cross‐linking density of nanocomposites is very suitable for IPN systems and this amount of nanosize silicon dioxide affected the matrix to a suitable degree.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and characterization of nanocomposites of silicon dioxide and polyurethane and epoxy resin interpenetrating network

Zhang

Wang

et al. 2003

Polymer International

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Nanocomposites with varying concentrations of nanosized silicon dioxide particles were prepared by adding nanosilica to interpenetrating polymer networks (IPN)s of polyurethane and epoxy resin (PU/EP). The PU/EP IPNs and nanocomposites were studied by dynamic mechanical analysis, scanning electronic microscopy, wide-angle X-ray diffraction and small-angle X-ray scattering. The result showed that adding nanosize silicon dioxide can improve the properties of compatibility, damping and phase structure of IPN matrices.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of nanocomposites of silicon dioxide and polyurethane and epoxy resin interpenetrating network

Zhang

Wang

et al. 2003

Polymer International

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“…On one hand, the intermolecular friction increased and the movement of macromolecular chains of the matrix is restricted. On the other hand, the decrease in free volume of the matrix accelerates phase separation and limits the motion of some macromolecular chains of matrix so that the damping of composite decreases 25. Thus, under mild degree of crosslinking the filler can improve the compatibility and damping property of composite.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and properties of novel macromolecular coupling agents prepared by ATRP

Zhang

Jiang

Dong

et al. 2006

J of Applied Polymer Sci

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Novel block and graft macromolecular coupling agents with well-defined structures have been synthesized successfully by atom transfer radical polymerization (ATRP). The molecular weights and molecular weight distributions of those functional copolymers can be controlled because of the living/controlled ATRP. The structures and composition of block and graft copolymers with the monomers of butyl acrylate (BA), styrene (St), and 3-methacryloxyl-propyltrimethoxyl silicon (KH-570) have been characterized by mean of 1 H NMR, IR, GPC, and UV. Because the KH-570 of macromolecular coupling agents owns strong affinity to surface hydroxyl of fillers, inorganic fillers that were treated by the macromolecular coupling agents possess some new properties, for example increasing the effect between matrix and fillers of composites. The mechanical properties and morphology of composites with macromolecular coupling agents have been investigated by the dynamic mechanical spectra and SEM. The results showed that the damping value and compatibility of composites with macromolecular coupling agents were improved greatly when compared with that of composite with small molecular coupling agent. Furthermore with different contents of BA, St, and KH-570 in the macromolecular coupling agents, the damping value of the composites are different.

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Semi‐interpenetrating polymer networks based on polyurethane and polymethacrylate functional prepolymers: Morphology and mechanical properties in dependence of the concentration of functional groups

Anžlovar

Žigon

2001

J Polym Sci B Polym Phys

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Grafted semi‐interpenetrating polymer networks (IPNs) were prepared from polyurethane (PU) prepolymers with polyester soft segments and hard segments containing carboxylic functional groups as well as polymethacrylate (PM) prepolymers with tertiary amine functional groups. The dependence of morphological and mechanical properties on the concentration of functional groups was studied. The enhanced miscibility of PU and PM prepolymers was observed at concentrations of functional groups of 0.25 mmol/g of polymer and above. Despite the improved miscibility, the PM prepolymers showed a tendency toward phase separation. Because the observed glass‐transition temperature shifts of PU prepolymers indicated substantial miscibility, we ascribed this phenomenon to the presence of methyl methacrylate rich sequences in the PM prepolymer. The observed changes in mechanical properties by increasing the content of functional groups were typical for ionomers. Young's modulus increased as a result of physical interactions between functional groups. A significant drop in tensile strength was observed in IPN samples with phase‐separated PU and PM prepolymers. © 2001 John Wiley & Sons, Inc. J Polym Sci Part B: Polym Phys 40: 115–123, 2002

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The effect of composition and the introduction of positive charge group (?N(CH3)2) on the multiphase morphology of polyurethane/polyacrylates interpenetrating polymer networks

Cited by 6 publications

References 27 publications

Synthesis and characterization of nanocomposites of silicon dioxide and polyurethane and epoxy resin interpenetrating network

Synthesis and characterization of nanocomposites of silicon dioxide and polyurethane and epoxy resin interpenetrating network

Synthesis and properties of novel macromolecular coupling agents prepared by ATRP

Semi‐interpenetrating polymer networks based on polyurethane and polymethacrylate functional prepolymers: Morphology and mechanical properties in dependence of the concentration of functional groups

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