Properties and pervaporation separation of hydroxyl‐terminated polybutadiene‐based polyurethane/poly(methyl metharcylate) interpenetrating networks membranes

Tsai, Mei‐Hui; Huang, Shih-Liang; Chang, Po-Hsueh; Chen, Chiou-Jey

doi:10.1002/app.27079

Cited by 11 publications

(14 citation statements)

References 31 publications

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“…This higher storage modulus can be attributed to an increase in the PMMA component in this synthetic IPN. It can be concluded that increasing PMMA content in the IPN results in an increase in the polymeric strength (7). This may be a reason for increasing the storage modulus of 65/35 IPN relative to the other two synthetic IPNs (i.e., 75/25 and 85/15 IPNs).…”

Section: Discussionmentioning

confidence: 93%

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Preparation of Sound Absorption Material Based on Interpenetrating Polymer Network (PU/PMMA IPN)

et al. 2018

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Background: Polymer composites with interpenetrated polymer network (IPN) structure are widely used as sound and vibration damping materials due to their high viscoelastic properties within the glass transition temperature range. In this study, polyurethane (PU)/poly (methyl methacrylate) (PMMA)-based interpenetrating polymer network with different ratios of PU to PMMA (i.e. 85:15, 75:25, and 65:35) were prepared by in situ polymerization. Methods: The properties of as-prepared IPN and its components were evaluated by different scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and sound absorption. Tensile properties were also determined. As indicators of effective damping capability, viscoelastic parameters including loss factor (tan δ), glass transition temperature (Tg), and effective damping interval (tan δ > 0.3) were also determined. In order to determine the sound absorption coefficient in the prepared IPNs, a two-microphone impedance tube at the frequency of one octave was used. Results: The comparison of pure polymers (i.e. polyurethane and polymethyl methacrylate) and prepared IPNs indicated that the semi interpenetrated polymer network morphology was created through a broader range of tan δ in different IPNs. Incorporation of PMMA into polyurethane in the form of interpenetrating polymer networks enhanced the damping acoustic properties of the semi-IPNs due to the permeability of the two polymers. In the temperature range of-50 to 11˚C, both IPNs components showed high damping characteristics (tan δ ≥ 0.3). Conclusions: Evaluation of the results indicated that the blends are capable of exerting viscoelastic effects for damping and sound attenuation.

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Section: Discussionmentioning

confidence: 93%

“…polyol having at least two reactive hydrogen atoms. However, the applications of PU are limited due to its low mechanical strength and poor thermal stability (7).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Sound Absorption Material Based on Interpenetrating Polymer Network (PU/PMMA IPN)

et al. 2018

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“…It is a regular measure of the surface hydrophobicity that provides information on the hydrophobic or hydrophilic surface at the air-watersolid interface. 41 High contact angles between 70 and 90 indicate strongly hydrophobic surfaces such as those of fluorocarbon polymers, whereas low contact angles (0-30 ) indicate highly hydrophilic surfaces such as those of glass and mica. 42 The contact angles against water increased with the PVDF content in the blend films, and this was caused by the hydrophobicity of PVDF due to the CF 2 group of PVDF.…”

Section: Contact-angle Studymentioning

confidence: 99%

Investigation of the structural, thermal, mechanical, and optical properties of poly(methyl methacrylate) and poly(vinylidene fluoride) blends

Pawde

Deshmukh

2009

J of Applied Polymer Sci

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In this investigation, poly(methyl methacrylate) (PMMA) and poly(vinylidene fluoride) (PVDF) blends (w/w) were prepared in a Brabender (South Hackensack, NJ) plasticorder with a thermoplastic mixing chamber (type W60) preheated at 180 C. These blends were further converted into films by a conventional solution casting method and characterized with Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray diffraction, mechanical property measurements, impact strength testing, ultraviolet-visible spectroscopy, refractive-index measurements, and contact-angle study. The Fourier transform infrared results indicated that the compatibility between these two systems resulted from hydrogen bonding between the carbonyl group of PMMA and the CH 2 group of PVDF. The thermal analysis showed depressions in the glass-transition temperature, melting temperature, and crystallization temperature. The heat of crystallization increased with an increase in the PVDF content in the blend. An increase in the heat of crystallization meant an increase in the crystallinity. An increase in the cooling rate increased the crystallization rate. The improvement in the mechanical properties of the blend films indicated that the observed behavior was ascribable to a more coherent structure of the blends due to strong specific interactions between PMMA and PVDF chains. The impact strength analysis revealed a substantial increase in the impact strength from 21.64 to 38.52 J/m. Optical absorption spectra suggested the presence of an optical band gap energy that increased with an increase in the PVDF content in the blend. The contact angle against water increased with the PVDF content in the blend film, and this was caused by the hydrophobicity of PVDF due to the CF 2 group of PVDF.

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“…A group of polymers used as components of IPNs or semi-IPNs are polybutadienes with predominant 1,4-structure [8][9][10][11][12][13][14][15][16][17]. One of the most common investigations is preparation of IPNs [8][9][10][11]13] or semi-IPNs [12] with methacrylic polymers.…”

Section: Introductionmentioning

confidence: 99%

“…One of the most common investigations is preparation of IPNs [8][9][10][11]13] or semi-IPNs [12] with methacrylic polymers. In a typical procedure hydroxylterminated butadiene was reacted with isocyanate, and the resulting polymer was swollen with a methacrylate, dimethacrylate, or mixture of methacrylates of various functionality which was then polymerized to form IPN.…”

Section: Introductionmentioning

confidence: 99%

Methacrylate-based polymer blends containing oligomeric 1,2-polybutadienes

Marcinkowska

Andrzejewska

2013

J Therm Anal Calorim

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Partly miscible polymer blends with semi-IPNs structure built from polydimethacrylate networks and hydroxyl-terminated liquid polybutadienes with predominant 1,2-structure (LBH) were prepared by photopolymerization method. Photopolymerization kinetics of dimethacrylate-LBH mixtures were monitored by DSC technique under isothermal conditions. Kinetic curves and related parameters, like polymerization rate and degree of double bond conversion were determined as functions of dimethacrylate structure, LBH molecular mass, and its content in the mixture as well as polymerization temperature. The photopolymerization kinetics and activation energy for the polymerization rate were discussed taking into account the phase separation occurring during the curing reaction. The extent of phase separation (based on T g 's measurements) depended on LBH content and dimethacrylate chemical structure. The effect of LBH content on hardness of polymer blends was also examined.

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Properties and pervaporation separation of hydroxyl‐terminated polybutadiene‐based polyurethane/poly(methyl metharcylate) interpenetrating networks membranes

Cited by 11 publications

References 31 publications

Preparation of Sound Absorption Material Based on Interpenetrating Polymer Network (PU/PMMA IPN)

Preparation of Sound Absorption Material Based on Interpenetrating Polymer Network (PU/PMMA IPN)

Investigation of the structural, thermal, mechanical, and optical properties of poly(methyl methacrylate) and poly(vinylidene fluoride) blends

Methacrylate-based polymer blends containing oligomeric 1,2-polybutadienes

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