Phosphorus‐containing benzoxazine modified epoxy resin: High flame retardancy, low dielectric, and low water absorption DOI

Jiuhong Liu,

Jie Liu,

Guangrui Yu

et al.

Journal of Applied Polymer Science, Journal Year: 2023, Volume and Issue: 141(12)

Published: Dec. 22, 2023

Abstract A phosphorous‐containing benzoxazine, (3‐(4‐hydroxyphenyl)‐3,4‐dihydro‐2H‐benzo[e][1,3]oxazin‐4‐yl)diphenylphosphine oxide (DPOBH), was synthesized and used as flame retardant co‐curing agent in the presence of 4,4′‐diaminodiphenylsulfone (DDS) for diglycidyl ether bisphenol‐A (DGEBA) epoxy resin. The retardancy, thermal stability, T g , dielectric properties, water absorption properties resins (EP) were investigated compared. incorporation DPOBH results ca. 40%–45% increase limiting oxygen index (LOI) values. UL‐94 V‐0 rating could be achieved EP/DPOBH 1.2 sample with LOI value 35.1%. Compared EP, 47% decrease peak heat release rate (PHRR) obtained . According to cone calorimetry tests (CCT), play roles both gas condensed phases. Moreover, reduce rate, constant, loss. All suggest that is a type suitable EP electronic fields.

Language: Английский

Closed-Loop Recycling of Tough and Flame-Retardant Epoxy Resins DOI
Wei Fang, Junheng Zhang, Cheng Wu

et al.

Macromolecules, Journal Year: 2023, Volume and Issue: 56(14), P. 5290 - 5305

Published: July 3, 2023

Large-scale applications of flame-retardant epoxy resins have caused sustainability concerns on the use renewable resources and end-of-life wastes. New strategies are required to address chemical recycling fire-safe resins. Here, we demonstrated recyclable (FREPs) using itaconic acid-derived hyperbranched resin (IA-EHBP) (1,3,5-hexahydro-s-triazine-1,3,5-triyl) benzyl mercaptan (HT-BM). The unique structure enabled a closed-loop network that can be degraded into monomers with up 86% yield recovered monomers. topological IA-EHBP also contributed significant improvement in strength toughness FREPs. By positron annihilation lifetime spectroscopy, effects free-volume hole size relative fractional mechanical performance dynamic properties FREPs were studied, function relations therefore established based Williams–Landel–Ferry equation. incorporation effectively promoted formation char residue produced phosphorus- sulfur-containing free radicals prevent generation combustible volatiles, thus enhancing flame retardancy. recycled reused multiple times without loss performance. method reported here provides facile approach for high-efficiency reuse materials.

Language: Английский

Citations

41
Mixed hyperbranched poly(aryl ether ketone) results in high toughness and excellent thermal resistance in epoxy resin DOI

Shuanger Li,

Huichao Liu,

Haoran Zhu

et al.

European Polymer Journal, Journal Year: 2024, Volume and Issue: 210, P. 112951 - 112951

Published: March 16, 2024

Language: Английский

Citations

9
Enhancing Flame Retardancy and Dielectric Performance of Epoxy Resins through Benzoxazine-Phosphorus Modification DOI

Jiuhong Liu,

Mei Wu,

Zhenye Fu

et al.

Polymer, Journal Year: 2024, Volume and Issue: 305, P. 127173 - 127173

Published: May 15, 2024

Language: Английский

Citations

7
Catalyst-free Construction of Biomass-based Robust and Flame-retardant Polyurethane Foams DOI
Shuping Huo, Guomin Wu, Guifeng Liu

et al.

Polymer Degradation and Stability, Journal Year: 2024, Volume and Issue: 225, P. 110805 - 110805

Published: May 3, 2024

Language: Английский

Citations

5
Design, Performance, and Mode of Action of Hyperbranched Fire Retardants: Advancement and Perspective DOI
H. Hu, Lei Zhang,

X.D. Yuan

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Language: Английский

Citations

5
Water-Soluble Biobased Modifier Toward Epoxy/Cellulose Fabric Composite with Simultaneous Enhancement of Flame Retardancy and Interface Adhesion DOI
Liyue Zhang, Jingkai Liu, Xiaoling Liu

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(11), P. 6241 - 6251

Published: May 17, 2024

Natural plant fibers, as green and lightweight alternatives to traditional fibers in fabricating composites, have attracted much interest recent years. However, their hydrophilic flammable natures severely limit the interfacial adhesion flame resistance of composite, synchronous improvement both remains a considerable challenge. Herein, combined modifier consisting water-soluble benzoxazine (HGB) with high carbonization phytic acid (PA) containing phosphorus elements groups was devised treat regenerated cellulose fabric (SF). The treated (F-SF) not only could realize self-extinguishing from fire, which helps avoid wick effects, but also exhibited an optimized property composites. After being intrinsic flame-retardant epoxy resin (F-EP), composite material (F-SF/F-EP) achieved V-0 rating UL-94 test excellent limiting oxygen index (LOI) value 33.8% due effect gaseous condensed phases. Simultaneously, benefiting improved compatibility, tensile modulus impact strength were enhanced 9.82 GPa 6.58 MPa 11.29 7.21 MPa, respectively, compared untreated SF/EP especially interlaminar shear (ILSS) dramatically increased by 21.7%. This work provided integrated strategy for synchronously enhancing compatibility fire-proof performance fiber-reinforced

Language: Английский

Citations

4
Research progress on properties and applications of bio-based polybenzoxazine materials DOI
Rongzhi Li, Xuan Zhou, Minggui Shen

et al.

Sustainable materials and technologies, Journal Year: 2025, Volume and Issue: unknown, P. e01387 - e01387

Published: April 1, 2025

Language: Английский

Citations

0
Synthesis of Thermoplastic Phenolphthalein Polyether Sulfone and Its Toughening Research in Epoxy Resin and CFRP DOI

Meixin Wang,

Haishui Wang, Lixin Song

et al.

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(15)

Published: April 1, 2025

Abstract This work investigated the thermo‐mechanical properties of phenolphthalein polyether sulfone (PES‐C) in toughening epoxy resin and CFRP, along with an analysis mechanisms. PES‐C, a high‐performance high glass transition temperature modulus due to its specific cardo ring structure group, was synthesized incorporated into through physical blending enhance mechanical matrix. With addition 15 phr PES‐C impact strength increased by 72.71 %, SEM revealed bi‐continuous island coexistence structure, mechanism attributed reaction‐induced phase separation. The thermal performance improved, T d5% g using TGA DMA analyses. Additionally, non‐woven fabric fabricated via electrospinning integrated EP/CF prepregs for interlayer toughening. G I, C, II, C CFRP 37.5 % 134 respectively. could be enhanced bonding provided fabric, which effectively mitigated fiber debonding. These two approaches demonstrated that exhibited excellent effects on both offering significant application potential aerospace field.

Language: Английский

Citations

0
Novel Multifunction Epoxy Thermoset Designed by Manipulating the Silicon-Oxidation Flexible-Rigid Network Topology: Toughening, Strengthening, and Acid/Alkali Resistance DOI
Qibin Xu, Shengchang Zhang, Kaixiang Wang

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2023, Volume and Issue: 62(36), P. 14743 - 14754

Published: Aug. 30, 2023

The inherent strength–toughness trade-off in thermosetting epoxy resins (EPs) renders them susceptible to permanent failure from crack propagation during use, impeding their sustainable development. This study presents a topology-based approach for constructing and regulating the cross-linked network that couples hardness with softness at molecular level solve trade-off. Specifically, an organosilicon compound aliphatic chain (KH560) only short side groups (tetraethoxysilane) are used introduce rigid flexible structures work synergistically into EP. By adjusting proportion of (i.e., units EP Si–O–Si structures) linear chains), size concentration free volume as well topological secondary structures, including weight resin, flexibility, cross-linking density, can be regulated. Furthermore, effects structure on performance studied. controlled, overcome. For example, tensile strength critical strain energy release rate modified (ESi-D1) 47 444% higher than those conventional EP, respectively. provides efficient method construct topology controllably overcomes trade-off, improving beyond traditional paradigms opening new applications

Language: Английский

Citations

5
Microstructural Analysis of Benzoxazine Cationic Ring‐Opening Polymerization Pathways DOI Open Access
Francisco Wanderson Moreira Ribeiro, Isaac Omari, Gilian T. Thomas

et al.

Macromolecular Rapid Communications, Journal Year: 2023, Volume and Issue: 45(2)

Published: Sept. 16, 2023

Abstract Herein, an evaluation of the initial step benzoxazine polymerization is presented by mass spectrometry, with a focus on differentiating phenoxy and phenolic products formed distinct pathways cationic ring opening (ROP) mechanism polybenzoxazine formation. The use infrared multiple photon dissociation (IRMPD) ion mobility spectrometry (IMS) techniques allows for differentiation two provides valuable insights into ROP mechanism. results suggest that type I pathway favored in stages reaction yielding product, while II product should be observed at later when would interconvert to most stable product. Overall, findings here provide important information polymerization, allowing development optimal conditions represents way evaluate other multifunctional processes.

Language: Английский

Citations

4