Thermosetting resin compositions based on novolac and modified novolac

Mustaţă, Fanica

doi:10.1002/adv.20218

Cited by 10 publications

(3 citation statements)

References 44 publications

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“…The energies of cross-linking reactions obtained from DSC thermograms are situated in the range 45− 74 kJ•mol −1 and are in good agreement with literature data. 8,34 The thermal degradation characterization was investigated by means of thermokinetic analysis. The dependence of the activation energy of the degradation process versus the conversion degree for the cross-linked products, calculated by FRD and FOW methods, indicates that the process is complex and is divided into several stages.…”

Section: Discussionmentioning

confidence: 99%

Epoxy Resins Cross-Linked with Bisphenol A/Methylenedianiline Novolac Resin Type: Curing and Thermal Behavior Study

Mustaţă¹,

Tudorachi²,

Bicu³

2012

Ind. Eng. Chem. Res.

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A novolac type resin was synthesized from bisphenol A, 4,4′-methylenedianiline, and formaldehyde in the presence of HCl. The chemical structure was confirmed using elemental analysis, FT-IR spectroscopy, and 1H NMR spectroscopy. The curing kinetics of these epoxy resins at an epoxy ring/amine proton molar ratio of 1/1, were studied by nonisothermal differential scanning calorimetry (DSC) at different heating rates. The kinetic analysis of the curing reactions was evaluated using the variable peak exotherm method of Flynn–Wall–Ozawa and Kissinger. The thermal degradation mechanisms for novolac resin (FR) and cured resins were identified taking place between two and four steps, depending on the chemical structure of the sample. The most probable kinetic model and kinetic parameters of the degradation process were estimated using Netzsch Thermokinetics software. The cured resins have good thermal stability, with activation energies of thermal degradation reactions having values situated in the range 127–184 kJ·mol–1.

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Section: Discussionmentioning

confidence: 99%

Epoxy Resins Cross-Linked with Bisphenol A/Methylenedianiline Novolac Resin Type: Curing and Thermal Behavior Study

Mustaţă¹,

Tudorachi²,

Bicu³

2012

Ind. Eng. Chem. Res.

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“…The research field of PF resins is nowadays divided into two streams. The first one is interested in improving specific properties through the incorporation of different organic or inorganic species [ 2 , 3 , 4 ]. The second one is focused on moving from phenol and formaldehyde to biodegradable or environmentally friendly raw materials [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Improved Synthetic Route of Incorporation of Nanosilicon Species into Phenol-Formaldehyde Resin and Preparation of Novel ZnAl-Layered Double-Hydroxide Hybrid Phenol-Formaldehyde Resin

et al. 2022

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Hybrid phenol-formaldehyde (PF) resins represent one of the most important niche groups of binding systems for composites. New industrial needs, environmental requirements, and price fluctuations have led to further research on materials with enhanced mechanical and thermal properties. The preparation of novel hybrid materials can be achieved by inclusion of various elements or functional groups in the organic polymer phenolic framework. Herein, we report the synthesis and characterization of a PF-based hybrid material with different nanoscale silicone species and ZnAl-layered double hydroxide (LDH). The main goals of this study were to improve the synthetic pathways of hybrid resin, as well as to prepare granulated composite materials and test samples and determine their characterization. Added inorganic species increased the glass-transition temperature by a minimum of 8 °C, which was determined using differential scanning calorimetry (DSC). Rheological properties (melting viscosity and flow distance) of the hybrid resin were measured. The homogeneity of distribution of added species across the organic matrix was evaluated with scanning electron microscopy (SEM). With synthesized new hybrid-binding systems, we prepared different granulated composite materials and evaluated them with the measurements of rheological properties (flow curing characteristics). Tensile strength of samples, prepared from granulated composite material, improved by more than 5%.

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“…Therefore, mineral fillers can be used to lower the dielectric loss of polymeric materials in order to be applied as dielectric materials. Low-cost polymer/mineral fillers composites have been reported to be used for various applications [9,10].…”

Section: Introductionmentioning

confidence: 99%

Low‐cost poly(vinyl chloride)/poly(α‐methylstyrene‐acrylonitrile)/chlorinated polyethylene/mineral fillers composites with highly improved thermal conductivity I: Mechanical and thermal performance

Zhang

Zhu

2016

Polymer Composites

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Low‐cost mineral fillers, including mica, calcium carbonate (CaCO3), and alumina oxide (Al2O3) were used to modify poly(vinyl chloride) (PVC)/α‐methylstyrene–acrylonitrile copolymer (α‐MSAN)/chlorinated polyethylene (CPE) blend. With the addition of mineral fillers, the thermal conductivity, flexural modulus and overall thermal stability were improved; however, loss in tensile properties, impact and flexural strength, and initial thermal stability accompanied the other improved properties. The theoretical modeling results indicate that mica has a more effective potential to increase the thermal conductivity and better interfacial interaction with the polymeric matrix. Therefore, mica is the best candidate for enhancing the properties of the composites. POLYM. COMPOS., 39:553–559, 2018. © 2016 Society of Plastics Engineers

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Thermosetting resin compositions based on novolac and modified novolac

Cited by 10 publications

References 44 publications

Epoxy Resins Cross-Linked with Bisphenol A/Methylenedianiline Novolac Resin Type: Curing and Thermal Behavior Study

Epoxy Resins Cross-Linked with Bisphenol A/Methylenedianiline Novolac Resin Type: Curing and Thermal Behavior Study

Improved Synthetic Route of Incorporation of Nanosilicon Species into Phenol-Formaldehyde Resin and Preparation of Novel ZnAl-Layered Double-Hydroxide Hybrid Phenol-Formaldehyde Resin

Low‐cost poly(vinyl chloride)/poly(α‐methylstyrene‐acrylonitrile)/chlorinated polyethylene/mineral fillers composites with highly improved thermal conductivity I: Mechanical and thermal performance

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