Rheological, mechanical, and morphological studies of epoxy/poly(methyl methacrylate) semi‐interpenetrating polymer networks

Siddaramaiah,; Barcia, Fábio L.; Sirqueira, Alex da Silva; Paranhos, Caio Márcio; Soares, Bluma G.

doi:10.1002/app.25572

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…43 The vitrification time (t vitr ) has been determined as the time corresponding to the maximum G̕ ̕ peak. 44,45 The obtained gel time and vitrification time for the epoxy, epoxy/ clay nanocomposites and epoxy/clay/CTBN hybrid at different curing temperatures are tabulated in Table 2. It was observed that epoxy/3 phr I.28E mixture attained the gelation and vitrification in a shorter time compared to neat epoxy, while epoxy/3 phr I.30E system has a delayed gelation and vitrification than that of the neat epoxy.…”

Section: Resultsmentioning

confidence: 99%

The role of clay modifier on cure characteristics and properties of epoxy/clay/carboxyl-terminated poly(butadiene-co-acrylonitrile) (CTBN) hybrid

Puglia

P³

et al. 2016

Materials Technology

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Epoxy/clay/carboxyl-terminated poly(butadiene-co-acrylonitrile) (CTBN) hybrids were prepared with two different organically modified clays. Octadecyl amine and trimethyl stearyl ammonium-modified nanoclays (Nanomer I.30E and I.28E, respectively) were used. The dispersion of the nanoclay in binary epoxy/clay and epoxy/clay/CTBN hybrid nanocomposites was investigated using scanning electron microscopy and optical microscopy, and the observed morphological details were explained by the prediction of solubility parameter for each component in the nanocomposites. The effect of clay modifier on cure characteristics of binary epoxy/clay and epoxy/clay/CTBN hybrid nanocomposites was studied using rheological analysis. Glass transition temperatures (T g ) and thermal stability of binary and hybrid nanocomposites were also measured. The reduced cross-link density via epoxy homopolymerization, the plasticizing effect of clay modifier/dissolved liquid rubber and the interfacial adhesion between the polymer and the clay platelets were found to affect the Tg of epoxy/clay/CTBN hybrid. In epoxy/clay/ CTBN hybrid, the thermal stability was mainly attributed to the presence of CTBN which hide the effect of clay modifiers.

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Section: Resultsmentioning

confidence: 99%

The role of clay modifier on cure characteristics and properties of epoxy/clay/carboxyl-terminated poly(butadiene-co-acrylonitrile) (CTBN) hybrid

Puglia

P³

et al. 2016

Materials Technology

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“…Despite the combination of these general classes of polymers being investigated previously, research has generally been concerned with a combination of two rigid, high T g polymers [30]. In this case, by using a combination of high and low T g polymers the opportunity exists to not only tailor the morphology of these two distinct systems, but to manipulate the mechanical properties over a wide range.…”

Section: Resultsmentioning

confidence: 99%

Morphology Control in a Dual-Cure System for Potential Applications in Additive Manufacturing

et al. 2019

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The polymerisation, morphology and mechanical properties of a two-component in-situ reacting system consisting of a rubbery dimethacrylate and a rigid epoxy polymer were investigated. The methacrylate component of the mixture was photocured using UV light exposure and, in a second curing process, the mixture was thermally postcured. The polymers formed a partially miscible system with two glass transition temperature (Tg) peaks measured using dynamic mechanical thermal analysis (DMTA). The composition and relative rate of reaction of the two orthogonal polymerisations influenced the extent of miscibility of the two polymer-rich phases and the samples were transparent, indicating that the two phases were finely dispersed. The addition of a glycidyl methacrylate compatibiliser further increased the miscibility of the two polymers. The utility of this polymer system for additive manufacturing was investigated and simulated through layer-by-layer processing of the mixture in two steps. Firstly, the methacrylate component was photocured to solidify the material into its final shape, whilst the second step of thermal curing was used to polymerise the epoxy component. With the use of a simulated photomask, a simple shape was formed using the two orthogonal polymerisation stages to produce a solid object. The mechanical properties of this two-phase system were superior to a control sample made only of the methacrylate component, indicating that some reinforcing due to polymerisation of the epoxy across the interfaces had occurred in the postcuring stage.

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“…As expected, the gel time is dependent on both the curing temperature and the MWCNT content. That is, the gel time decreases as the cure temperature increases, resulting in the cure reaction occurring more rapidly [11]. This is probably due to the increase of molecular mobility.…”

Section: Rheological Propertiesmentioning

confidence: 97%

A study on rheological behavior of MWCNTs/epoxy composites

Park

Bae

Seo

2010

Journal of Industrial and Engineering Chemistry

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Rheological, mechanical, and morphological studies of epoxy/poly(methyl methacrylate) semi‐interpenetrating polymer networks

Cited by 7 publications

References 30 publications

The role of clay modifier on cure characteristics and properties of epoxy/clay/carboxyl-terminated poly(butadiene-co-acrylonitrile) (CTBN) hybrid

The role of clay modifier on cure characteristics and properties of epoxy/clay/carboxyl-terminated poly(butadiene-co-acrylonitrile) (CTBN) hybrid

Morphology Control in a Dual-Cure System for Potential Applications in Additive Manufacturing

A study on rheological behavior of MWCNTs/epoxy composites

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