Epoxy/anhydride networks modified with polyhedral oligomeric silsesquioxanes

Montero, Belén; Serra, Àngels; Ramis, Xavier

doi:10.1002/pc.22381

Cited by 15 publications

(9 citation statements)

References 42 publications

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“…Table 2 shows the experimental heats of polymerization, Dh, calculated as the average heat of the experiments at different heating rates. By increasing the proportion of modifier Dh (J=g) decreases due to the lower content of reactive epoxy and anhydride groups, whereas Dh (kJ=ee) remains almost constant and similar to the values reported in the literature [19,[26][27][28] . FTIR spectra of cured samples showed that the absorbance bands at 913 cm À1 and at 1860-1780 cm À1 (figure not shown), attributed to the oxirane and anhydride groups, respectively, disappeared completely.…”

Section: Results and Discussion Curing Of Dgeba/mthpa With Different supporting

confidence: 87%

New Epoxy-Anhydride Thermosets Modified with Multiarm Stars with Hyperbranched Polyester Cores and Poly(ϵ-caprolactone) Arms

Tomuta

Fernández‐Francos

Ferrando

et al. 2014

Polymer-Plastics Technology and Engineering

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Multiarm star polymers with hyperbranched aromatic or aromaticaliphatic cores and poly(e-caprolactone) arms have been used as toughness modifiers in epoxy-anhydride formulations catalyzed by benzyldimethylamine. The curing process has been studied by dynamic scanning calorimetry, demonstrating little influence of the mobility of the reactive species and the hydroxyl content on the kinetics of this process. The obtained materials were characterized by thermal and mechanical tests and the microstructure by electron microscopy. Homogeneous thermosets have been obtained with a remarkable increase in impact strength without compromising glass transition temperature, thermal stability or hardness.

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Section: Results and Discussion Curing Of Dgeba/mthpa With Different supporting

confidence: 87%

New Epoxy-Anhydride Thermosets Modified with Multiarm Stars with Hyperbranched Polyester Cores and Poly(ϵ-caprolactone) Arms

Tomuta

Fernández‐Francos

Ferrando

et al. 2014

Polymer-Plastics Technology and Engineering

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“…This can be achieved by incorporating structural features that enhance flexibility or mobility within the backbone of the polymer while potentially minimizing deleterious impact upon other properties. Examples of this include increasing the molecular weight between crosslinks, blending epoxy resins with different structure, or incorporating greater aliphatic rather than aromatic groups into a network …”

Section: Introductionmentioning

confidence: 99%

Effect of aromatic substitution on the kinetics and properties of epoxy cured tri‐phenylether amines

Varley

Dao

Tucker

et al. 2019

J of Applied Polymer Sci

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The reaction kinetics and structure property relationships of isomeric tri‐aromatic ether‐linked amines based on the structure bis (aminophenoxy) benzene, cured with diglycidyl ether of bisphenol F (BisF) are investigated in this study. Reaction kinetics are explored using rheological and calorimetric measurements, whereas structure property relationships are determined from their flexural properties, dynamic mechanical properties (DMTA), and thermogravimetric analysis (TGA). A BisF network cured with 4,4 diamino diphenyl sulphone (44 DDS) is used as a benchmark to represent a commercially available high‐performance resin system. Varying the substitution of the ether linkages on the aromatic groups from ortho, meta to para was found to have a significant impact on reactivity and network properties after cure. The variations are explained in terms of inductive and resonance effects primarily acting on the outer aromatic rings. Interestingly, however, these same effects acting on the central aromatic ring also impact upon reactivity despite their proximity from the amines. Mechanical and thermal properties are explained by changes in the short‐range molecular mobility within the network architecture such as phenylene rotations or π flips and are experimentally validated from the breadth and position of the subambient γ relaxations. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47383.

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“…Also, their structures which are prone to brittle (Ersoy, 2001), combustible and fragile, restrict the use of such resins (Güzel, 2016). Hardened resin layer's physical and mechanical properties depend on the functional group types of hardener, cross-link density between resin and hardener, molecular structure and hardening conditions of functional group bonds between resin and hardener (Şahmetlioğlu, 2000;Nohales et al, 2006;Montero et al, 2013;Güzel, 2016).…”

Section: Resultsmentioning

confidence: 99%

The Effect of Modification with Epoxy and Polyester Resins on Some Mechanical Properties of Pine and Chestnut Woods

Pelit

2019

Journal of Anatolian Environmental and Animal Sciences

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In this study, the effects of epoxy and polyester resin applications on some mechanical strength properties of scots pine (Pinus sylvestris L.) and chestnut (Castanea sativa) wood samples were investigated. Firstly, in the circular sawing machine, a different numbers of channels (2+1 and 3+2) were opened on the surfaces of wood samples. Then, these channels were filled with casting type epoxy and polyester resins. The density, modulus of rupture (MOR), modulus of elasticity (MOE), and compression strength parallel to the grain (CS) tests were performed on the samples. According to the results of the study, the density values of pine and chestnut samples increased by 25% and 42%, respectively, depending on the number of channels after resin application. In addition, compared with epoxy resin applied samples, the density increase was higher in the polyester resin applied samples. After application of resins, a slight increase was observed in the MOR and MOE values of chestnut samples. However, CS values tend to decrease in these samples. In pine samples with resin applied, the strength properties (MOR, MOE and CS) decreased depending on the increase in the number of channels. Furthermore, the effect of the resin type on all strength properties of the samples was statistically insignificant.

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Epoxy/anhydride networks modified with polyhedral oligomeric silsesquioxanes

Cited by 15 publications

References 42 publications

New Epoxy-Anhydride Thermosets Modified with Multiarm Stars with Hyperbranched Polyester Cores and Poly(ϵ-caprolactone) Arms

New Epoxy-Anhydride Thermosets Modified with Multiarm Stars with Hyperbranched Polyester Cores and Poly(ϵ-caprolactone) Arms

Effect of aromatic substitution on the kinetics and properties of epoxy cured tri‐phenylether amines

The Effect of Modification with Epoxy and Polyester Resins on Some Mechanical Properties of Pine and Chestnut Woods

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