Investigation on damping behavior and morphology of polyurethane/polymethacrylates and polyacrylates interpenetrating polymer networks

Chen, Qingmin; Ge, Hanhua; Chen, Dongzhong; He, Xiangdong; Yu, Xia

doi:10.1002/app.1994.070540901

Cited by 49 publications

(34 citation statements)

References 9 publications

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“…Dynamic mechanical analysis (DMA) of TPUs typically shows sharp transitions with well-defined loss tangent (tan d) peaks over a narrow temperature range [57][58][59][60][61][62][63][64][65][66][67][68][69]. A common criterion to identify effective, broad-temperature-range, acoustic and/ or vibration damping materials is tan d P 0.30 over at least a 60°C temperature range [70][71][72][73][74][75][76][77][78]. Given its characteristic viscoelastic response, TPU by itself cannot serve as a broad-temperature-range acoustic damping material.…”

Section: Introductionmentioning

confidence: 99%

“…Given its characteristic viscoelastic response, TPU by itself cannot serve as a broad-temperature-range acoustic damping material. To increase the T g breadth, efforts have been made to combine TPUs with secondary polymeric components such as epoxy [74], polyester [75], polyacrylate [76,77], polystyrene [78], etc. into crosslinked interpenetrating polymeric network (IPN) structures.…”

Section: Introductionmentioning

confidence: 99%

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Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges

Beniah

Liu

Heath

et al. 2016

European Polymer Journal

104

111

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a b s t r a c tNon-isocyanate thermoplastic polyhydroxyurethane (PHU) elastomers were synthesized from cyclic carbonate aminolysis using polytetramethylene oxide (PTMO) as soft segment and divinylbenzene dicyclocarbonate and three diamine chain extenders as hard segment with a range of hard-segment content. Characterization was done via Fourier transform infrared spectroscopy, small-angle X-ray scattering (SAXS), uniaxial tensile testing, and dynamic mechanical analysis (DMA). SAXS reveals that these PHUs possess nanophaseseparated morphology with 10-20 nm interdomain spacings. These PHUs display elastomeric response and tunable tensile properties with Young's modulus ranging from 27 to 200 MPa, tensile strength from 0.3 to 9.7 MPa and elongation at break ranging up to greater than 2000%. DMA reveals that nanophase separation in these PHUs is accompanied by broad interphases having a wide range of local composition; this nanophase separation differs significantly from that manifested by thermoplastic polyurethane elastomer (TPU) due to hydrogen bonding of hydroxyl groups in the hard segments to the PTMO soft segment. These PHUs show very good damping performance with tan d P 0.30 over broad temperature ranges (P60°C), which are tunable through simple variation of hardsegment content and chain extender structures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges

Beniah

Liu

Heath

et al. 2016

European Polymer Journal

104

111

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“…9 Initially, IPNs were considered as quasi-homogeneous; however, in most systems microscopic phase separation occurs sometimes on a scale of tens of nanometers only. 10,11 In some cases, these morphologies can indeed yield unique mechanical properties. Examples are IPNs of polymethacrylates with polyurethane [12][13][14][15][16] or siloxanes, 17 and poly(ethylene terephthalate) with castor oil, 18 which all can possess, for certain compositions, an extremely high strain at break.…”

Section: Introductionmentioning

confidence: 99%

Rubber-Modified Glassy Amorphous Polymers Prepared via Chemically Induced Phase Separation. 4. Comparison of Properties of Semi- and Full-IPNs, and Copolymers of Acrylate−Aliphatic Epoxy Systems

et al. 1999

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The introduction of rubbery particles can be applied to enhance shear yielding and, consequently, the toughness of brittle amorphous polymers. The critical transition in these polymers from crazing to shear yielding requires a submicrometer-or even nanometer-sized rubbery phase. These can be obtained via coalescence suppression in processes involving chemically induced phase separation but are also obtained in interpenetrating polymer networks (IPN) where cross-linking or gelation is responsible for the morphology control. In all cases, the formation of a nanometer-sized morphology is accompanied by an enhanced interphase mixing, i.e., incomplete demixing resulting in a broad interface in which the composition gradually changes from one phase to the other. In this study, the influence of interphase mixing on the mechanical properties has been investigated. Besides the standard semi-IPN system based on poly(methyl methacrylate) and aliphatic epoxy resins, two additional systems being composed of the same constituents but with an increased degree of interfacial mixing have been investigated: a full-IPN prepared by cross-linking the acrylate phase and a copolymer system in which the acrylate phase is chemically bonded to the epoxy phase. In situ small-angle X-ray scattering experiments during tensile deformation demonstrated that the microscopic deformation mechanism is clearly influenced by the degree of demixing. Despite this, the macroscopic toughness is found to be rather system independent since for all three systems, a comparable synergistic toughening effect is observed in both tensile and impact deformation.

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“…The composition within these phases varies greatly from one microlocation to other, but overall it produces a single, broad T g . 19,20 This is exemplified in the present case. The interpenetrating nature of the network produces microheterogeneous phases rather than macroheterogeneous phases, thus leading to distinct SEM features and dynamic mechanical properties.…”

Section: Sem Analysismentioning

confidence: 64%

Sequential interpenetrating polymer network of poly(ethyl methacrylate) and carboxylated nitrile rubber: Dynamic mechanical analysis and morphology

Manoj

Raut

Sivaraman

et al. 2005

J of Applied Polymer Sci

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An interpenetrating polymer network (IPN) based on poly(ethyl methacrylate) (PEMA) and carboxylated nitrile rubber was synthesized. Peroxide crosslinked XNBR was swollen in ethyl methacrylate containing benzoyl peroxide as initiator and tetraethylene glycol dimethacrylate as crosslinking agent. A full and sequential IPN is formed by the two independently crosslinked phases of XNBR and PEMA. Dynamic mechanical analysis of the 50/50 XNBR/ PEMA IPN shows a single, broad peak whereas a 50/50 blend shows two distinct peaks, indicating the pinning down of a microheterogeneous structure during the IPN formation rather that macrophase separation as in blends. SEM analysis confirms the development of a cocontinuous intimate structure of the IPN.

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Investigation on damping behavior and morphology of polyurethane/polymethacrylates and polyacrylates interpenetrating polymer networks

Cited by 49 publications

References 9 publications

Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges

Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges

Rubber-Modified Glassy Amorphous Polymers Prepared via Chemically Induced Phase Separation. 4. Comparison of Properties of Semi- and Full-IPNs, and Copolymers of Acrylate−Aliphatic Epoxy Systems

Sequential interpenetrating polymer network of poly(ethyl methacrylate) and carboxylated nitrile rubber: Dynamic mechanical analysis and morphology

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