Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
This work reports the synthesis and successful use of novel benzoxazines as reinforcing resins in polyisoprene rubber compounds. For this purpose, three new dibenzoxazines containing one (4DTP-fa) or two heteroatoms of sulfur (3DPDS-fa and 4DPDS-fa) were synthesized following a Mannich condensation reaction. The structural features of each benzoxazine precursor were characterized by H and C nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) and Raman. The new precursors showed well suited reactivity as characterized by differential scanning calorimetry (DSC) and rheology and were incorporated in rubber compounds. After the mixing, the curing profiles, morphologies and mechanical properties of the materials were tested. These results show that the structural feature of each isomer was significantly affecting its behavior during the curing of the rubber compounds. Among the tested benzoxazines, 3DPDS-fa exhibited the best ability to reinforce the rubber compound even compared to common phenolic resin. These results prove the feasibility to reinforce rubber compounds with benzoxazine resins as a possible alternative to replace conventional phenolic resins. This paper provides the first guide to use benzoxazines as reinforcing resins for rubber applications, based on their curing kinetics.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8069091 | PMC |
| http://dx.doi.org/10.3390/polym13081262 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Airborne microplastics and plastic additives in a school environment: identification, quantification, and associated inhalation risks.
Environ Int
August 2025
Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain. Electronic address:
Indoor and outdoor air pollution is related to adverse human health effects, especially in children due to their ongoing physical development. This study assesses airborne microplastics (MP) concentrations and associated inhalation risks in a school in Estarreja, Portugal, near a large industrial complex producing polyvinylchloride (PVC). PM samples were collected over two campaigns (winter and spring) in four classrooms (ages 3-11 years) and adjacent outdoor areas.
View Article and Find Full Text PDFImpact of cone system compatibility on single cone bioceramic obturation in canals prepared with variable taper NiTi rotary files.
Sci Rep
September 2025
Restorative Dental Sciences Department, Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Objective: This study examined how system-matching gutta-percha (GP) cones in conjunction with calcium silicate-based sealers (CSBS) affect the sealing quality of canals prepared with variable taper nickel titanium (NiTi) files, using confocal laser scanning microscopy (CLSM) and micro-computed tomography (micro-CT).
Materials And Methods: Forty-eight extracted human mandibular premolars were instrumented using the ProTaper Ultimate and divided into four groups based on GP cone (system-matching vs. non-matching) and sealer type (PlanB vs.
Temperature Dependence of Strain-Induced Crystallization in Silica- and Carbon Black-Filled Natural Rubber Compounds.
Polymers (Basel)
August 2025
Fraunhofer IMWS, Walter-Hülse-Str. 1, 06120 Halle (Saale), Germany.
The results of strain-induced crystallization (SIC) studies on natural rubber compounds containing different amounts of carbon black and silica are reported. Two-dimensional wide-angle X-ray diffraction (2D WAXD) experiments were performed to quantify the degree of SIC at ambient and enlarged temperatures. The influence of temperature and filler system on the degree of crystallinity of natural rubber was investigated, since the estimated temperatures in truck tire treads are in the range 60-80 °C.
View Article and Find Full Text PDFEffect of Surface-Modified Mica in Hybrid Filler Systems on the Curing and Mechanical Behavior of Ethylene-Propylene-Diene Monomer (EPDM)/Butadiene Rubber (BR) Blend.
Polymers (Basel)
August 2025
Department of Materials Science and Engineering, School of Chemical and Materials Engineering, The University of Suwon, Hwaseong 18323, Gyeonggi-do, Republic of Korea.
This study investigates the influence of hybrid filler systems comprising carbon black (CB), mica, and surface-modified mica (SM) on the properties of ethylene-propylene-diene monomer (EPDM)/butadiene rubber (PB) composites. To reduce the environmental issues associated with CB, mica was incorporated as a partial substitute, and its compatibility with the rubber matrix was enhanced through surface modification using ureidopropyltrimethoxysilane (URE). The composites with hybrid filler systems and surface modification were evaluated in terms of curing behavior, crosslink density, mechanical and elastic properties, and dynamic viscoelasticity.
View Article and Find Full Text PDFThe Effect of the Fresh Latex Ratio on the Composition and Properties of Bio-Coagulated Natural Rubber.
Polymers (Basel)
August 2025
Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.
By proportionally blending fresh latex from PR107, Reyan 72059, and Reyan 73397, and employing both acid- and enzyme-assisted microbial coagulation methods, this study analyzed the effects of the specific latex formulation on the following: physicochemical properties, non-rubber components, molecular weight and distribution, vulcanization characteristics of compounded rubber, and physical-mechanical properties of vulcanized natural rubber. The results indicate that, compared to acid-coagulated natural rubber, enzyme-assisted microbial coagulated natural rubber exhibits slightly lower levels of volatile matter, impurities, plasticity retention index (PRI), nitrogen content, calcium ions (Ca), iron ions (Fe), and fatty acid content. Conversely, it demonstrates higher values in ash content, initial plasticity (P), Mooney viscosity (M), acetone extract, magnesium ions (Mg), copper ions (Cu), manganese ions (Mn), gel content, molecular weight and distribution, and glass transition temperature (Tg).
View Article and Find Full Text PDF