Glass Reinforcement of Various Epoxy Resins-Polyurea Systems

Joshi, Medha; Jauhari, Smita

doi:10.1007/s11665-011-9989-x

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…Depending on the nature of the components which are implied in the process, polyurea may have aliphatic or aromatic structure. Aliphatic linear polymers are thermoplastic products whose difference between melting temperature and decomposition temperature is between 50-100 o C [1]. Polyureas which contains aromatic structures have the melting temperature close to the decomposition temperature.…”

mentioning

confidence: 99%

Polymeric Composites Based on Polyurea Matrix Reinforced with Carbon Nanotubes

Vulcan¹,

Damian²,

Stănescu³

et al. 2017

Mat.Plast.

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This paper deals with the synthesis of polyurea and its use as polymer matrix for nanocomposites reinforced with multi-walled carbon nanotubes (MWCNT). Two types of materials were obtained during this research, the first cathegory uses the polyurea as matrix and the second one uses a mixture between epoxy resin and polyurea. The nanocomposites were characterized by Thermogravimetric Analysis (TGA), Dynamic Mechanical Analysis (DMA), Scanning Electron Microscopy (SEM) and Tensile Tests .The elastomeric features of nanocomposites were highlighted by the results which showed low value of Tg. Also higher thermal stability with ~40oC compared with commercial products (M20) were observed, but lower mechanical properties compared to neat polyurea.

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mentioning

confidence: 99%

Polymeric Composites Based on Polyurea Matrix Reinforced with Carbon Nanotubes

Vulcan¹,

Damian²,

Stănescu³

et al. 2017

Mat.Plast.

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“…), it was really difficult to objectively compare our mechanical properties with those of others EP laminates. Relative to laminate systems reported in previously published articles, the mechanical properties of our laminates were in a reasonable range.…”

Section: Resultsmentioning

confidence: 99%

Flame‐retardant, glass‐fabric‐reinforced epoxy resin laminates fabricated through a gradient distribution mode

Liao

Liu

Jiang

et al. 2016

J of Applied Polymer Sci

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In general, epoxy resin (EP) glue mixed with a high content of flame retardants is used to coat glass fabrics layer by layer to prepare fire‐retardant printed circuit boards (PCBs). However, the addition of the flame retardants not only increases the cost but also greatly deteriorates the processability and mechanical properties of the PCBs. In this study, a gradient distribution mode of composite flame retardants was designed and applied in EP‐based PCB composites. Unlike the traditional uniform distribution mode, in which flame retardants are evenly distributed in every resin layer, the gradient mode concentrates a higher content of the flame retardants on the surface layer, and the concentrations are gradually reduced along the thickness. In this way, the surface resin can quickly form a condensed charring barrier to hold back fire; this effectively protects the underlying resin, which has lower contents of flame retardant. The results of this study show that PCB prepared by the gradient mode obtained satisfactory flame retardance (a UL94 V‐0 rating) with only a 3.5 wt % total amount of flame retardant; this value was much lower than that (6.3 wt %) of composites featuring a uniform distribution. Additionally, the gradient mode also maintained the mechanical properties of PCB better. The tensile, impact, and flexural strengths of the gradient distribution system were obviously higher than those of the uniform distribution one with the same content of flame retardant. On the basis of the mode, a more economic and efficient technology was developed to manufacture flame‐retardant layered PCB. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44369.

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“…Physical methods such as the incorporation of plasticizers or blending with rubber materials and chemical approaches like introducing tougheners that can react with epoxy resins or curing agents are the two main strategies widely employed to improve the toughness of epoxy resin. Thermoplastic polymers, such as polyamide, polyether amine, , dicyandiamide, amine-terminated poly(arylene ether ketone) oligomers, urethane prepolymer, and amine-terminated polyurea oligomers, are frequently used as chemical tougheners for toughening classical epoxy resin, which is also considered to work for the epoxy CAN systems. Finely tuning the toughener content and intermolecular interaction is proposed to be capable of achieving the synergetic improvement for toughness, tensile strength, and Young’s modulus of epoxy CANs together.…”

Section: Introductionmentioning

confidence: 99%

Carbon Fiber Reinforced Epoxy Resin Composites with Excellent Recyclable Performance via Dynamic Acylsemicarbazide Moieties

Yang

Wang

Zhang

et al. 2023

ACS Appl. Polym. Mater.

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Achieving the recycling of the carbon fiber reinforced epoxy resin composite is of great significance toward pursuing a sustainable and circular economy but remains a challenge due to the infusible and insoluble properties of epoxy resin. In this study, the acylsemicarbazide (ASC) moieties are introduced into the network to obtain the dynamic reversible cross-linked thermoset epoxy resin (EPOXY-ASC). An optimized EPOXY-ASC with a tensile stress of 81.27 MPa and an elongation at break of 13.80% exhibits excellent reprocessing performance due to the dynamic reversibility of ASC moieties. The carbon fiber reinforced polymer composites with the EPOXY-ASC resin were successfully prepared with an interlaminar shear strength of 44.86 MPa and can be fully recycled by a solvolysis method without additional agents. The recycled carbon fiber and resin still maintain the original properties well. This study provides a solution to recycle the CFRP composite, which conforms to a circular economy.

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Glass Reinforcement of Various Epoxy Resins-Polyurea Systems

Cited by 5 publications

References 10 publications

Polymeric Composites Based on Polyurea Matrix Reinforced with Carbon Nanotubes

Polymeric Composites Based on Polyurea Matrix Reinforced with Carbon Nanotubes

Flame‐retardant, glass‐fabric‐reinforced epoxy resin laminates fabricated through a gradient distribution mode

Carbon Fiber Reinforced Epoxy Resin Composites with Excellent Recyclable Performance via Dynamic Acylsemicarbazide Moieties

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