Spectral distribution of photocurrent in poly(6-tert-butyl-3-methyl-3,4-dihydro-2H-1,3-benzoxazine)

Kishore, V.C.; Dhanya, R.; Sreekumar, K.; Joseph, Rani; Kartha, C. Sudha

doi:10.1016/j.synthmet.2008.04.012

Cited by 12 publications

(4 citation statements)

References 23 publications

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“…To meet these challenges as above-mentioned, the use of bisphenol A-aniline-based benzoxazine (BA-a), as a new thermosetting resin that can be polymerized by the ring opening reaction without the use of kind of coupling agent and with no by-products resulting from its curing, has recently drawn much attention. With its near zero shrinkage, low flammability, high thermal stability, and high glass transition temperature [8,9,10,11,12,13,14], nevertheless, it should be understood that these thermosets have presented some defects such as their toughness deficiency, highly breakable characterization, and limited hardness for extremely exigent applications [15,16], which are significant disadvantages that researchers need to focus on [17,18]. To surmount the aforementioned shortcomings of the pure benzoxazine resins, several alternative strategies like the use of organic or inorganic fillers [19], and/or fibers as reinforcing systems, have been employed [20,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Hybrid Composites with Enhanced Mechanical and Thermal Properties Based on Polybenzoxazine and Chopped Kevlar/Carbon Hybrid Fibers

et al. 2018

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This work studied the structural, morphological, mechanical, and thermal properties of newly designed polymeric materials using high-performance hybrid fibers to reinforce the polybenzoxazine resins. To achieve this goal, hybrid fibers consisting of chopped Kevlar and carbon fibers were subjected to a silane surface treatment, incorporated into the resin matrix in various combinations, and then isothermally cured using the compression molding technique. The mechanical performances of the prepared composites were scrutinized in terms of bending and tensile tests. By way of illustration, the composites holding 20 wt % Kevlar fibers and 20 wt % carbon fibers accomplished a bending strength and modulus of 237.35 MPa and 7.80 GPa, respectively. Additionally, the same composites recorded a tensile stress and toughness of 77 MPa and 0.27 MPa, respectively, indicating an increase of about 234% and 32.8% when compared to the pristine resin’s properties. The thermogravimetric analysis denoted an excellent thermal resistance of the reinforced hybrid composites. Fourier transform infrared spectroscopy proved that the functional groups of the as-used coupling agent were effectively grafted on the external surfaces of the reinforcing systems, and further confirmed that the chemical reaction took place between the treated fibers and the polybenzoxazine matrix, although the scanning electron microscope showed a uniform dispersion and interfacial adhesion of the fibers within the resin matrix. In fact, the incorporation of treated fibers along with their good dispersion/adhesion could explain the progressive enhancement in terms of thermal and mechanical properties that were observed in the hybrid composites.

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Section: Introductionmentioning

confidence: 99%

Multifunctional Hybrid Composites with Enhanced Mechanical and Thermal Properties Based on Polybenzoxazine and Chopped Kevlar/Carbon Hybrid Fibers

et al. 2018

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“…They possessed very attractive properties such as high thermal stability, high char yields, high glass transition temperature (T g ), near-zero volumetric change upon curing, good mechanical and dielectric properties, low water absorption, good optical properties, and low flammability. [2][3][4][5][6][7][8][9] It is well recognized that all these striking properties could be attributed to the consequence of molecular packing affected by intermolecular and intramolecular hydrogen bonding. 10 These unique characteristics promoted the polybenzoxazines over epoxies and traditional phenolic resins in electronics, aerospace, and other industries.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of chitosan particle-reinforced polybenzoxazine blends

Ramdani

Chrigui

Wang

et al. 2014

Journal of Composite Materials

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This study investigates the effects of chitosan particles (CTS) on the curing behavior, thermal and thermomechanical properties of polybenzoxazine matrix. The morphological, thermomechanical, and thermal properties of the blends are analyzed using scanning electron microscopy (SEM), dynamic scanning calorimetry (DSC), dynamical mechanical analyzer (DMA), and thermogravimetric analysis (TGA). The results show that the −NH2 groups on the chitosan can act as an active crosslinking position and hydrogen bonding. The SEM micrographs reveal good compatibility between the blend components. Furthermore, the values of glass transition temperatures, char yields, and storage moduli of the cured blends are found to be increased with the increase of CTS contents to reach 191℃, 34%, 4.3 GPa, respectively, at 10% of CTS content.

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“…They are synthesized via the thermal ring-opening of the aromatic oxazines rings. They associated with very attractive properties such as high glass transition temperature (T g ) [1], near-zero volumetric change upon curing [2], good mechanical and dielectric properties [3], low water absorption [4], good optical properties [5], and low flammability [6]. All these striking properties could be attributed to the consequence of molecular packing affected by inter-molecular and intra-molecular hydrogen bonding [7].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Thermal Properties of Polybenzoxazine/TiC Hybrids

Ramdani

Wang

Liu

2014

AMR

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In this work, typical polybenzoxazine, as new class of phenolic resin, has been used as a matrix for preparing a series of high performance hybrid materials using various amounts of titanium carbide (TiC) ranging between 0-10 wt% as fillers, via a solution blending technique. The thermal properties of bisphenol A-aniline base benzoxazine monomers (BA-a) and TiC mixtures have been studied by differential scanning calorimetry (DSC). The thermal stability of their cured hybrids has been tested by means of thermogravimetric analysis (TGA). The result showed that the glass transition temperature of the prepared composites increased with increasing the amount of TiC to reach a higher value at 194°C. Also, the incorporation of TiC nanoparticles has considerably improved the thermal stability of the hybrids including the char yield which increase by 50 % at 10 wt% TiC content.

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Spectral distribution of photocurrent in poly(6-tert-butyl-3-methyl-3,4-dihydro-2H-1,3-benzoxazine)

Cited by 12 publications

References 23 publications

Multifunctional Hybrid Composites with Enhanced Mechanical and Thermal Properties Based on Polybenzoxazine and Chopped Kevlar/Carbon Hybrid Fibers

Multifunctional Hybrid Composites with Enhanced Mechanical and Thermal Properties Based on Polybenzoxazine and Chopped Kevlar/Carbon Hybrid Fibers

Preparation and properties of chitosan particle-reinforced polybenzoxazine blends

Preparation and Thermal Properties of Polybenzoxazine/TiC Hybrids

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