Open Access
ARTICLE
Yujie Zhang, Yankai Zhao, Zhuang Zhao, Mengmeng Shan, Bochen Xu, Haoquan Xue, Junxuan Xu, Fan Wu, Qiang He*
Journal of Polymer Materials, DOI:10.32604/jpm.2026.076617
（This article belongs to the Special Issue: Recent Advances in Extraction, Characterization and Application of Cellulose Nanocrystals)
Abstract This study presents a sustainable approach for the valorization of spent coffee grounds (CG) by converting them into carboxylated cellulose nanofibrils (CG-TCNF) via formic acid/hydrogen peroxide pretreatment followed by TEMPO/NaClO/NaClO2-mediated oxidation. The pretreatment efficiently removed lignin, hemicellulose, and other non-cellulosic components, yielding purified cellulose (CG-C) with high crystallinity (CrI = 84%). Subsequent regioselective oxidation introduced carboxyl groups at the C6 position of cellulose chains, achieving a high carboxylate content of 1.4 mmol/g. The resulting CG-TCNF exhibited a well-dispersed nanofibrillar morphology with an average width of 3.57 nm and a high specific surface area of 265 m2/g. More >
Open Access
ARTICLE
Janvi Sharma1,*, Mukund N. Bapat2
Journal of Polymer Materials, DOI:10.32604/jpm.2026.072228
Abstract A new, cost-effective porous polymer composite was developed by reinforcing polypropylene (PP) with cenosphere particles. This study investigates how the composite’s dielectric properties are affected by their porosity. Dielectric constant (ε′) measurements were taken over a range of frequencies at room temperature. A theoretical model was developed to explain the electrical conductivity of the porous PP/cenosphere composites. The study thoroughly examined how the inclusion of cenosphere particles influenced key electrical parameters, including dielectric constant, dissipation factor (tanδ), DC (direct current) conductivity, and AC (alternating current) conductivity. The results revealed that increasing the cenosphere content caused a… More >
Open Access
ARTICLE
Declan Mary Colbert1,*, Eyman Manaf1, Zeeshan Ali1, Steven Rowe2, Chris Doran2, Trevor Howard2, Vlasta Chyzna3, Evan Moore3, Alan J. Murphy3, Patrick Doran4, Golnoosh Abdeali1, Declan M. Devine1
Journal of Polymer Materials, DOI:10.32604/jpm.2026.076318
（This article belongs to the Special Issue: Development and Application of Biodegradable Plastics)
Abstract A comparative analysis was performed on poly(lactic acid) (PLA), poly(caprolactone) (PCL), basalt fiber (BF) composites produced using two distinct approaches: direct blending and masterbatching. The limitations of PLA-BF composites with regard to distribution and adhesion are well-documented, as are chemical treatment methods (addition of compatibilisers, surface treatments, silanization). This work aimed to study an industrially relevant potential solution of utilising a PCL-BF masterbatch, prepared as a 50/50 wt.% blend using planetary roller extrusion (PEX) to both improve the distribution and homogeneity of the fibers as well as provide a secondary adhesion site to facilitate improved… More >
Open Access
ARTICLE
Dongwei Shao, Hao Sun, Qi Wang, Ping Han, Yiwei Liu, Jiyi Luan, Lin Jia, Qiang He, Bo Cui*
Journal of Polymer Materials, DOI:10.32604/jpm.2026.074541
（This article belongs to the Special Issue: Sustainable Development and Multifunctional Application of Cellulose Composites)
Abstract The valorization of agricultural waste into high-value nanomaterials is crucial for advancing sustainable biorefineries. This study presents an efficient approach for extracting carboxylated cellulose nanocrystals (CNCs) from poplar leaf waste (PL), an abundant and underutilized biomass. The process involved alkaline treatment and hydrogen peroxide bleaching to purify cellulose (PL-CEL), followed by sequential periodate-chlorite oxidation to produce dicarboxylic cellulose nanocrystals (PL-CNCs). The resulting nanocrystals were comprehensively characterized using compositional analysis, XRD, FTIR, TEM, TGA, and zeta potential measurements. XRD analysis confirmed a high crystallinity index of 82% for PL-CEL, which decreased to 72.2% after oxidation due… More >
Open Access
ARTICLE
Zhipeng Ran*, Peishuang Xiao, Shuen Liang, Keping Chen, Xiuli Zhao*
Journal of Polymer Materials, DOI:10.32604/jpm.2026.074431
Abstract This study presents the development of high-performance, solvent-free polyurethane-urea (PU) elastomeric coatings engineered for rapid curing and precise sprayability. Utilizing polyoxytetramethylene glycol (PTMG) as the primary polyol and a static-mixing spraying technique, the formulations were systematically optimized. It was found that a soft-segment content of 64% yields optimal mechanical properties, achieving a remarkable tensile strength exceeding 30 MPa. Crucially, the incorporation of an ultra-low concentration (0.002 wt%) of dibutyltin dilaurate catalyst was sufficient to enhance curing completeness and mechanical performance while effectively eliminating moisture-induced foaming, a common challenge in solvent-free spray applications. The gel and… More >
Open Access
ARTICLE
Hui Fan, Xinqiang Li*
Journal of Polymer Materials, DOI:10.32604/jpm.2026.075290
（This article belongs to the Special Issue: Innovative Smart Polymeric Materials for Sustainable Energy Solutions: Bridging Advances in Energy and Biomedical Applications)
Abstract To meet the needs of the treatment of Cu2+ pollution in aqueous solution, the sodium alginate-modified polyacrylic acid (PAA/SA) composite hydrogel was prepared by solution polymerization with acrylic acid (AA) as monomer, sodium alginate (SA) as filler, N, N’-methylenebisacrylamide (MBA) as crosslinking agent, and potassium persulfate (K2S2O8) as initiator. The characterization results showed that the introduction of SA significantly improved the physical and chemical properties of PAA hydrogel materials. Scanning electron microscopy (SEM) showed that as the SA content increased, the materials gradually evolved from a dense blocky structure to a porous network. When the SA… More >
Open Access
ARTICLE
Peng Gong1, Tingzheng Yan1, Kang Yang2, Yumei Yue2,*, Shude Ji2,*, Lin Ma3, Yilun Wu1
Journal of Polymer Materials, DOI:10.32604/jpm.2025.074794
（This article belongs to the Special Issue: Damage and Fracture of Polymer Composites)
Abstract To comprehensively explore the impact of binder content on the mechanical properties of the Polymer bonded explosive (PBX) substitute material (Polymer-bonded Analogue Explosive (PAE)—it is renowned for its outstanding high-temperature resistance, exceptional mechanical properties, excellent chemical stability, and superior electrical insulation), a series of experiments are meticulously carried out. The dynamic and static mechanical properties, along with the microstructure of PAE, are precisely measured through the Split Hopkinson Pressure Bar (SHPB) test, static compression tests, and Scanning Electron Microscopy (SEM). The dynamic performance test outcomes clearly indicate that both the binder content (2%, 4%, 6%)… More >
Open Access
REVIEW
Kuok Ho Daniel Tang*
Journal of Polymer Materials, DOI:10.32604/jpm.2025.074391
（This article belongs to the Special Issue: Development and Application of Biodegradable Plastics)
Abstract Biobased biodegradable plastics have gained increasing attention as sustainable alternatives to petroleum-based materials in food packaging, offering biodegradability, renewability, and reduced environmental impact. This review adopts a narrative review approach, integrating studies published between 2015 and 2025 from major databases to critically evaluate the recent advances, feasibility, and limitations of biobased biodegradable plastics in food packaging. Literature was thematically analyzed by material type and functional enhancement to assess their feasibility and limitations for sustainable packaging applications. Recent advances have focused on enhancing their mechanical, barrier, and functional properties through polymer blending, nanoparticle reinforcement, and incorporation… More >
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