Vibration damping materials based on interpenetrating polymer networks of carboxylated nitrile rubber and poly(methyl methacrylate)

Manoj, N. R.; Chandrasekhar, L.; Patri, M.; Chakraborty, B.C.; Deb, Pritam

doi:10.1002/pat.324

Cited by 20 publications

(18 citation statements)

References 15 publications

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“…XNBR is polar, reactive polymer that exhibits good compatibility with polar or non-polar resins and higher degree of interaction with fillers 2 . It is also reported that XNBR has improved damping properties, showing a great potential as matrix polymers 3,4 . Since polymer are rarely used commercially in a pure state to modify some of their properties by the incorporation of various additives, such as fillers, vulcanizing agents, and plasticizers etc.…”

Section: Introductionmentioning

confidence: 95%

Carboxylated nitrile butadiene rubber/hybrid filler composites

Mousa

Heinrich

Simon³

et al. 2012

Mat. Res.

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The surface properties of the OSW and NLS are measured with the dynamic contact-angle technique. The x-ray photoelectron spectroscopy (XPS) of the OSW reveals that the OSW possesses various reactive functional groups namely hydroxyl groups (OH). Hybrid filler from NLS and OSW were incorporated into carboxylated nitrile rubber (XNBR) to produce XNBR hybrid composites. The reaction of OH groups from the OSW with COOH of the XNBR is checked by attenuated total reflectance spectra (ATR-IR) of the composites. The degree of curing DM (maximum torque-minimum torque) as a function of hybrid filler as derived from moving die rheometer (MDR) is reported. The stress-strain behavior of the hybrid composites as well as the dynamic mechanical thermal analysis (DMTA) is studied. Bonding quality and dispersion of the hybrid filler with and in XNBR are examined using scanning-transmission electron microscopy (STEM in SEM).

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Section: Introductionmentioning

confidence: 95%

Carboxylated nitrile butadiene rubber/hybrid filler composites

Mousa

Heinrich

Simon³

et al. 2012

Mat. Res.

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“…An effective way is to incorporate viscoelastic regions of several separate phases by using block copolymerization, [6] blending various polymers together, [7,8] preparing a polymer with laminated gradient properties, [9] or creating interpenetrating polymer networks (IPNS). [10,11] Another effective way is to prepare a polymer with a distribution of chemical structure, and hence with a range of thermal motions of the molecular segments, to widen the T g transition. [12] If a polymer possesses a gradual change in structure (termed 'gradient structure') its glass transition range should be broad, which will significantly expand its damping range.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Prepare a Gradient Polymer with a Wide Damping Temperature Range by In‐Situ Chemical Modification of Rubber During Vulcanization

Wang

Zhang

et al. 2006

Macromol. Rapid Commun.

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IntroductionDamping materials are finding numerous applications in the aircraft, automobile, and machinery industries for both the reduction of unwanted noise and the prevention of vibrational fatigue failure. [1] The viscoelastic properties of polymers make them ideally suited for use as effective damping materials. [2,3] The damping behavior of a polymer is mainly dominated by the viscoelastic transition region between the glassy state and rubbery state (near and above the glass transition temperature, T g ). In this region, polymer chain segments, but not whole polymer chains, can vibrate in phase with an external vibration. However, changes in molecular conformation can not keep up with the imposed vibration, which causes internal friction and energy dissipation. Damping behavior is a reflection of this internal friction. [4] The stronger the internal friction, the higher the loss modulus (E 00 ) or loss tangent (tan d) at the applicable temperature, and the better the damping property. Since real damping products are often used over a broad range of temperature and frequency, polymeric materials are needed with a greater width of the loss modulus or loss tangent peak. Usually, a homopolymer possesses an effective damping region over a temperature range of only about 20-30 8C, which is rather narrow for practical applications, for example, it would be typically 60-80 8C for outdoor use. [5] Summary: Based on the fact that rubber can be chemically modified by sulfur, and sulfur can diffuse into rubber driven by a concentration gradient and chemical reaction, a new approach for the preparation of a polymer with a gradient from rubbery to glassy phase has been developed using the sulfur-vulcanization reaction of rubber. The gradient polymer obtained exhibits a wide transition range spanning over 100 8C with a peak half-width of 69 8C. The mechanism of forming the gradient structure is also discussed.The gradient polymer exhibits a broad tan d width from À60 to 76 8C with the peak half-width spanning about 69 8C, indicating a wide damping temperature range.

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“…Typically, the temperature range for efficient damping of known rubbers is about 20-30 °C around the glass transition temperature. The glass transition can be broadened or shifted by the use of plasticizers or fillers, blending, grafting, copolymerization, crosslinking, or the formation of interpenetrating polymer networks (IPNs) [7][8][9][10][11][12][13][14]. But it is hard to obtain a damping material with a high tan δ value and a wide temperature range for damping properties at the same time.…”

Section: Introductionmentioning

confidence: 99%

Preparation and intermolecular interaction of bio-based elastomer/hindered phenol hybrid with tunable damping properties

Zhou¹,

Cai

Lei³

et al. 2015

Pure and Applied Chemistry

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In this research, crosslinked hybrids of a newly invented bio-based elastomer poly(di-isoamyl itaconate-co-isoprene) (PDII) and 3,9-bis[1,1-dimethyl-2{β-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5,5]-undecane (AO-80) were designed and prepared by the mechanical kneading of the PDII/AO-80 hybrids at a temperature higher than the melting point of AO-80, followed by the crosslinking of PDII during the subsequent hot-pressing/vulcanization process. The microstructure, morphology, and mechanical properties of the hybrids were systematically investigated in each preparation stage by using DSC, FTIR, XRD, SEM, DMTA, and tensile testing. Part of the AO-80 molecules formed an AO-80-rich phase, but most of them dissolved in the PDII to form a very fine dispersion in amorphous form. The results of FTIR and DSC indicated that strong intermolecular interactions were formed between the PDII and the AO-80 molecules. Each PDII/AO-80 crosslinked hybrid showed a single transition with a higher glass transition temperature and significantly higher loss value (tan δ) than the neat PDII because of intermolecular interactions between the PDII and the AO-80 molecules. For instance, tan δ of PDII/AO-80 consisting of 100 phr AO-80 achieved 2.6 times as neat PDII. The PDII/AO-80 crosslinked hybrids with applicability at room temperature are potential bio-based damping materials for the future.

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Vibration damping materials based on interpenetrating polymer networks of carboxylated nitrile rubber and poly(methyl methacrylate)

Cited by 20 publications

References 15 publications

Carboxylated nitrile butadiene rubber/hybrid filler composites

Carboxylated nitrile butadiene rubber/hybrid filler composites

A Novel Approach to Prepare a Gradient Polymer with a Wide Damping Temperature Range by In‐Situ Chemical Modification of Rubber During Vulcanization

Preparation and intermolecular interaction of bio-based elastomer/hindered phenol hybrid with tunable damping properties

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