Novel silicon-modified phenolic novolacs and their biofiber-reinforced composites: Preparation, characterization and performance

Li, Cheng; Fan, Hong; Wang, De‐Yi; Hu, Jijiang; Wan, Jianwei; Li, Bo‐Geng

doi:10.1016/j.compscitech.2013.08.016

Cited by 26 publications

(22 citation statements)

References 32 publications

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“…These results suggested that the impact strength of PR/AHBP could be obviously enhanced by the addition of AHBP. The improvement of impact strength was due to the decrease in the crosslink density and increasing in the unoccupied free volume causing by the introduction of AHBP with rigid phenyl structures . A similar effect of AHBP content on bend strength of PR/AHBP was observed, as shown in Figure and Table .…”

Section: Resultssupporting

confidence: 62%

Improving the heat‐resistance and toughness performance of phenolic resins by adding a rigid aromatic hyperbranched polyester

Liú

Wang

Jiang

et al. 2015

J of Applied Polymer Sci

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An aromatic hyperbranched polyester (AHBP) was synthesized by melt polycondensation from diphenolic acid and characterized by Fourier transform infrared spectrum (FTIR) spectra. The degree of branching (DB) value of AHBP calculated from the 13 C-NMR spectroscopy was 0.67. The number-average molecular weight (M n ) and weight-average molecular weight (M w ) of AHBP were 1792 and 4480 g/mol, respectively. Novel phenolic resins modified with AHBP (PR/AHBP) were then prepared, in which AHBP was used as toughener of phenolic resins. The effect of AHBP on the thermal properties of phenolic resins was studied by means of differential scanning calorimetry (DSC), thermal gravimetric analyses (TGA), and heat deformation temperature tests. The modified resins presented higher glass transition temperature (T g ) than the unmodified system due to that the rigid backbone structure of AHBP with a great deal of the benzene ring groups restricted the mobility of the chain segments of macromolecules. The DSC, scanning electron microscopy (SEM) analyses showed that AHBP had good compatibility with phenolic resin, and the modified resins showed ductile fracture. The results of mechanical performance measurements exhibited that the impact strength of PR/AHBP containing 15 wt % AHBP was about 130% higher than that of the neat phenolic resin, suggesting that the toughness of PR/AHBP was significantly improved by the addition of AHBP.

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Section: Resultssupporting

confidence: 62%

Improving the heat‐resistance and toughness performance of phenolic resins by adding a rigid aromatic hyperbranched polyester

Liú

Wang

Jiang

et al. 2015

J of Applied Polymer Sci

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“…All these chemicals were used without further purication. 21 To a three-necked 500 ml round-bottom ask equipped with a magnetic stirrer, a dropping funnel, a thermometer and a condenser, eugenol (164.2 g, 1 mol) and chloroplatinic acid in isopropyl alcohol (1.44 Â 10 À1 g, Pt 0.8 wt%) were charged. The mixture was heated to 60 C, and 1,1,3,3-tetramethyldisiloxane (67.2 g, 0.5 mol) was dropped slowly in 3 h. The exothermic reaction was conducted at 60-70 C. Aer the addition of 1,1,3,3-tetramethyldisiloxane, the mixture was continuously stirred for another 1 h. The unreacted reactants were removed using a rotary evaporator under vacuum at 80 C. The acquired product was 4,4 0 -(1,3-dipropyl-tetramethyldisiloxane)bis-2methoxyphenol (SIE) (97% yield).…”

Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of functional eugenol derivative based layered double hydroxide and its use as a nanoflame-retardant in epoxy resin

et al. 2015

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“…Besides, UPR not only can lead to improvement of toughness and impact resistance but also can improve thermal properties of modified epoxy resin. In addition, fiber reinforced UPR and PN can either lead to increase in mechanical and thermal resistance or improve in fire resistance, thermal stability and electrical conductivity [4,5]. Furthermore, in some of researches, PNER was reinforced with silicon nanoparticles in order to increase its physical properties.…”

Section: Introductionmentioning

confidence: 99%

Modification of Phenol Novolac Epoxy Resin and Unsaturated Polyester Using Sasobit and Silica Nanoparticles

Mousavi

Hashemi

Jahandideh

et al. 2017

Polymers from Renewable Resources

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Nanocomposites containing phenol novolac epoxy resin (PNER) were modified by unsaturated polyester resin (UPR) and then reinforced using sasobit and silica nanoparticles at different filler loadings via a multi-step manufacturing procedure. Afterward, effect of sasobit and silica loadings either on mechanical and thermal properties or on morphology of nanocomposites were examined. Results showed that increase in silica nanoparticles loading can improve both thermal and mechanical properties, but increase in silica loading more than 3 wt% can lead to decrease in the mechanical properties. In this case, addition of sasobit along with silica not only can improve the mechanical and thermal properties but also it can lead to improve in dispersion quality and morphology of nanocomposites. Eventually, with affordable and environmentally friendly materials such as sasobit, either production procedure or the overall quality and properties of nanocomposites can be improved.

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Novel silicon-modified phenolic novolacs and their biofiber-reinforced composites: Preparation, characterization and performance

Cited by 26 publications

References 32 publications

Improving the heat‐resistance and toughness performance of phenolic resins by adding a rigid aromatic hyperbranched polyester

Improving the heat‐resistance and toughness performance of phenolic resins by adding a rigid aromatic hyperbranched polyester

Synthesis and characterization of functional eugenol derivative based layered double hydroxide and its use as a nanoflame-retardant in epoxy resin

Modification of Phenol Novolac Epoxy Resin and Unsaturated Polyester Using Sasobit and Silica Nanoparticles

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