Investigation of thermal and mechanical properties of polybenzoxazine obtained in an in situ polymerization with surface‐modified montmorillonite clay

Sundaramoorthy, Malathi Devi; Durairajan, Madhavan; Jeyasubramanian, K.; Palani, Vallinayagam

doi:10.1002/pc.26787

Cited by 4 publications

(9 citation statements)

References 55 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is believed that the presence of functionalities on active surface of carbon makes the facile in situ formation of polybenzoxazine matrix. Such similar functionalities present on organo clay are reported to have such catalytic property earlier in our article 31 . It can be that while compared to plain varnish the BXP polymer dispersed coating has higher corrosion resistivity, that is, protection efficiency is increased from 85.4% to 96.86% which further increased to 99.54% due to presence of composite particles (ACWTYR@BXP).…”

Section: Resultssupporting

confidence: 78%

“…The benzoxazine polymer was synthesized from bis phenol‐A (0.035 M), aniline (0.007 M), and formaldehyde (0.014 M) by following the procedure depicted in the literature 31 …”

Section: Methodsmentioning

confidence: 99%

“…The composites were fabricated by dispersing carbon powder available commercially (ACCOM), and the activated carbons prepared as above, viz using computer keyboard (ACWCKB), sponge (ACWPUF), electrical switches (ACWES), and automobile tyres (ACWTYR) with the varying weight proportions. The in situ method of polymerization under melt condensation method reported earlier was followed to fabricate composites 31 . The carbon powder weight was optimized based on the total weights of precursors used in the fabrication of BXP polymer.…”

Section: Methodsmentioning

confidence: 99%

“…Such similar functionalities present on organo clay are reported to have such catalytic property earlier in our article. 31 It can be that while compared to plain varnish the BXP polymer dispersed coating has higher corrosion resistivity, that is, protection efficiency is increased from 85.4% to 96.86% which further increased to 99.54% due to presence of composite particles (ACWTYR@BXP). The hydrophobic nature of thus formed polybenzoxazine and its better adhesion due to…”

Section: Bode Plotmentioning

confidence: 99%

“…The in situ method of polymerization under melt condensation method reported earlier was followed to fabricate composites. 31 The carbon powder weight was optimized based on the total weights of precursors used in the fabrication of BXP polymer. The total weight of precursors used for the preparation of BXP, that is, bisphenol A (0.035 M/0.9 g), aniline (0.007 M/0.62 g), and paraformaldehyde (0.014 M/0.35 g) is 1.87 g, and the quantity of carbon powder shall vary from 0.05 to 0.10 g. When 0.05 g of activated carbon is added, its weight percentage to the total weight of precursor 0:05 Ä 1:92 ð Þ Â 100 is 2.6%.…”

Section: Fabrication Of Carbon Loaded Bxp Composites In An In Situ Ma...mentioning

confidence: 99%

See 4 more Smart Citations

Synergistic effect of activated carbon from disposed plastics and polybenzoxazine composite coating on corrosion inhibition

Malathi Devi,

Madhavan,

Jeyasubramanian

et al. 2024

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

The fabrication of activated carbon dispersed polybenzoxazine (BXP) composite through a single step melt condensation technique is reported. Employing green strategy, activated carbon (AC) was obtained from various types of worn‐out plastics such as computer keyboard, sponge, electrical switches, and automobile tyres. Structural features of all the polymeric composites were explored using Fourier transform infrared (FTIR) spectroscopy, Field Emission Scanning Electron Microscope (FESEM) with Energy Dispersive X‐ray Analysis (EDAX). Thermal stability and hardness of the composites was analyzed by recording thermogravimetric analysis (TGA) and Rockwell hardness measurements. The results of thermal studies revealed that AC–BXP composites show higher thermal stability (301.98°C) than BXP (220.71°C). Rockwell hardness study (RHN) for ACWCKB@BXP is 71 whereas pristine BXP showed only 20. The corrosion protection ability of coated steel was examined through potentiodynamic polarization and electrochemical impedance spectroscopy analysis. From the Tafel plot, more shift in Ecorr value (from −0.6286 to −0.5065 V) towards positive side confirms its corrosion protection ability. Furthermore, the Icorr, the corrosion rate and the corrosion protection efficiency of the ACWTYR@BXP composite are 0.83 × 10−6 A/cm2, 0.0098 mm/year, and 99.54%, respectively, which inhibit the rate of corrosion to a greater extent in 3.5% NaCl solution. The current study applies principles of green chemistry like minimum number of synthesis steps, non‐usage of solvents and simply adoptable coating procedure.

show abstract

Section: Resultssupporting

confidence: 78%

“…The benzoxazine polymer was synthesized from bis phenol‐A (0.035 M), aniline (0.007 M), and formaldehyde (0.014 M) by following the procedure depicted in the literature 31 …”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Bode Plotmentioning

confidence: 99%

Section: Fabrication Of Carbon Loaded Bxp Composites In An In Situ Ma...mentioning

confidence: 99%

See 3 more Smart Citations

Synergistic effect of activated carbon from disposed plastics and polybenzoxazine composite coating on corrosion inhibition

Malathi Devi,

Madhavan,

Jeyasubramanian

et al. 2024

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

show abstract

Ultra‐fast curing of benzoxazine with surface modified fly ash‐assisted microwave: Achieving excellent comprehensive performances

Cao,

Liu,

Jiang

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

Benzoxazine has aroused a lot of research interest because of its high mechanical performance and excellent thermal stability in polybenzoxazines. However, it suffers from its high curing temperature and long curing time, which necessitate resolution. This study addresses this issue by employing a surface‐modified fly ash‐assisted microwave curing method to achieve ultra‐fast benzoxazine curing within 15 min. The impact strength of the resulting cured product displayed an increasing‐then‐decreasing trend with the addition of fly ash, reaching a maximum impact strength of 18.71 ± 1.20 kJ/m2 at a 3% fly ash content. This value is 113.3% higher than the impact strength of pure PBA‐a. Additionally, when using the same amount of fly ash, the microwave‐cured product exhibited a flexural strength of up to 135.9 MPa and a flexural modulus of up to 6.71 GPa, surpassing those of pure PBA‐a by 28.7% and 33.1%, respectively. Moreover, the glass transition temperature (Tg) increased by 19.56°C. Furthermore, there was a slight improvement in flexural strength compared to the heat‐cured product, and no significant loss in thermal properties was observed. The method demonstrated in this study presents a novel approach for the rapid molding and preparation of benzoxazine in composites.

show abstract

Enhancing comprehensive performances of polybenzoxazine through integration of soft core–soft shell cellulose‐based nanoparticles

Wang,

Han,

Jiang

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

To further increasing the toughness performance of thermoset resins without sacrificing their other properties is still a challenge task. In this study, the soft core–soft shell nanoparticles based on polydopamine‐modified cellulose nanocrystals (P‐CNC) were synthesized and seamlessly integrated with Bisphenol A‐aniline benzoxazine (BA‐a). Notably, the results underscore the remarkable impact of a mere 0.2 wt% of P‐CNC on BA‐a, boosting the impact strength of the modified system to 19.5 kJ/m2. This achievement represents a substantial 140.7% increase compared with pure polybenzoxazine. Moreover, the flexural strength reaches 133.4 MPa, surpassing pure polybenzoxazine by 16.2%. And the modified system exhibits a 10% weight loss temperature (Td10) at 321.7°C, accompanied by a char yield of 27.6%. This holistic approach results in a notable enhancement of the toughness performance while concurrently maintaining the flexural strength and the thermal stability of the modified system. Consequently, the integration of soft core–soft shell nanoparticles emerges as a promising strategy for enhancing thermoset resin properties without undermining their existing exceptional attributes.Highlights The core–shell nanoparticles were made by dopamine and cellulose nanocrystals. The core–shell nanoparticles can enhance the toughness of polybenzoxazine. Nanoparticle‐matrix interactions and deformation led to improved properties.

show abstract

Investigation of thermal and mechanical properties of polybenzoxazine obtained in an in situ polymerization with surface‐modified montmorillonite clay

Cited by 4 publications

References 55 publications

Synergistic effect of activated carbon from disposed plastics and polybenzoxazine composite coating on corrosion inhibition

Synergistic effect of activated carbon from disposed plastics and polybenzoxazine composite coating on corrosion inhibition

Ultra‐fast curing of benzoxazine with surface modified fly ash‐assisted microwave: Achieving excellent comprehensive performances

Enhancing comprehensive performances of polybenzoxazine through integration of soft core–soft shell cellulose‐based nanoparticles

Contact Info

Product

Resources

About