Synthesis of Dehydrated Ricinoleic Acid/Maleic Anhydride Adduct Based on Diels‐Alder Reaction: Characteristics and its Application in Pressure‐Sensitive Adhesive DOI Open Access
Panpan Xu, Yan Fang, Yanlan Bi

et al.

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(13)

Published: March 31, 2025

Abstract Dehydrated ricinoleic acid (DRA)/maleic anhydride (MA) adducts were prepared through the Diels‐Alder (DA) reaction and then applied for preparation of pressure‐sensitive adhesives (PSAs). The parameters DRA/MA adduct optimized by investigating effects molar ratio, temperature, time on adduction degree with value (AV) as evaluation index. Results showed that optimal ratio MA DRA at 1.2: 1, temperature 120 °C, 1.5 h, under which AV reached up to 298.7 mg KOH/g. from Fourier transform infrared spectroscopy, mass spectrometry, nuclear magnetic resonance spectrum DA effectively occurred between conjugated diene MA. rheology differential scanning calorimetry a higher viscosity glass transition than due introduction Thermogravimetric analysis had good thermal stability. Compared epoxidized linseed oils‐based PSA (peel strength 0.217 N/cm loop tack 0.390 N), copolymerized oils adhesion 0.309–1.813 0.713–7.490 N) was crosslinked mainly polyesterifications.

Language: Английский

Sustainable Strong Adhesive from Fully Biobased Itaconate Polyester and Brewer’s Spent Grain via Molar Ratio Optimization DOI
Tow‐Jie Lok, Yuan-Xiang Fu, Jie‐Wei Wong

et al.

ACS Applied Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Language: Английский

Citations

0
Practical Pyrogallol‐Derived Epoxy Resins via Low‐Temperature Two‐Step Synthesis: Unlocking High Efficiency and Thermal Stability for Sustainable Application DOI Open Access
Yu Long, Li Cui, Yue Zhao

et al.

Journal of Applied Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

ABSTRACT As the depletion of fossil resources drives demand for sustainable alternatives, bio‐based epoxy resins (EP) face a critical challenge in balancing processability and mechanical performance. This study presents novel low‐viscosity EP, c‐E3PG, synthesized from renewable pyrogallol via two‐step low‐temperature method. By optimizing reaction conditions, c‐E3PG achieves high yield (65.8%) target compound E3PG (pyrogallol triglycidyl ether) with minimal byproducts, exhibiting viscosity 1500 cps at 25°C—significantly lower than conventional petroleum‐based resins. Curing kinetics analysis reveals low activation energy (70 kJ/mol), enabling efficient crosslinking, while cured resin demonstrates glass transition temperature ( T g ) 145°C, storage modulus E′ 2900 MPa, exceptional electrical insulation properties (breakdown strength: 142.41 kV/mm; volume resistivity: 11.0 × 10 15 Ω·cm). These results highlight c‐E3PG's dual advantages ease processing robust thermomechanical performance, positioning it as scalable, eco‐friendly alternative high‐temperature packaging applications.

Language: Английский

Citations

0
Synthesis of Dehydrated Ricinoleic Acid/Maleic Anhydride Adduct Based on Diels‐Alder Reaction: Characteristics and its Application in Pressure‐Sensitive Adhesive DOI Open Access
Panpan Xu, Yan Fang, Yanlan Bi

et al.

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(13)

Published: March 31, 2025

Abstract Dehydrated ricinoleic acid (DRA)/maleic anhydride (MA) adducts were prepared through the Diels‐Alder (DA) reaction and then applied for preparation of pressure‐sensitive adhesives (PSAs). The parameters DRA/MA adduct optimized by investigating effects molar ratio, temperature, time on adduction degree with value (AV) as evaluation index. Results showed that optimal ratio MA DRA at 1.2: 1, temperature 120 °C, 1.5 h, under which AV reached up to 298.7 mg KOH/g. from Fourier transform infrared spectroscopy, mass spectrometry, nuclear magnetic resonance spectrum DA effectively occurred between conjugated diene MA. rheology differential scanning calorimetry a higher viscosity glass transition than due introduction Thermogravimetric analysis had good thermal stability. Compared epoxidized linseed oils‐based PSA (peel strength 0.217 N/cm loop tack 0.390 N), copolymerized oils adhesion 0.309–1.813 0.713–7.490 N) was crosslinked mainly polyesterifications.

Language: Английский

Citations

0