Influence of filler/reinforcing agent and post-curing on the flexural properties of woven and unidirectional glass fiber-reinforced composites

Furtos, Gabriel; Silaghi-Dumitrescu, Laura; Moldovan, Mărioara; Baldea, Bogdan; Trușcă, Roxana; Prejmerean, Cristina

doi:10.1007/s10853-011-6169-1

Cited by 24 publications

(13 citation statements)

References 34 publications

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“…The mechanical properties of FRCs depend on two main variables: the type of organic matrix [9,10], which gives the mechanical properties of the organic part [11,12], and the inorganic filler [13], characterized by the type, size, and geometry [13,14]. Other factors that influence the mechanical behavior of FRCs are the silanization [8], factors affecting the polymerization efficiency [15,16], and the binding between the inorganic filler and the organic matrix [8,17]. The clinical longevity of a dental material such as FRCs is correlated with the mechanical properties [18], because increased mechanical properties facilitate a good response to occlusal mechanical stress (clinical wear) [19].…”

Section: Introductionmentioning

confidence: 99%

Influence of Filler Loading on the Mechanical Properties of Flowable Resin Composites

et al. 2020

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The aim of this study was to evaluate the correlation between the percent of inorganic filler by weight (wt. %) and by volume (vol. %) of 11 flowable resin composites (FRCs) and their mechanical properties. To establish the correlation, the quantity of inorganic filler was determined by combustion and shape/size analyzed by SEM images. The compressive strength (CS), flexural strength (FS), and flexural modulus (FM) were determined. The CS values were between 182.87-310.38 MPa, the FS values ranged between 59.59 and 96.95 MPa, and the FM values were between 2.34 and 6.23 GPa. The percentage of inorganic filler registered values situated between 52.25 and 69.64 wt. % and 35.35 and 53.50 vol. %. There was a very good correlation between CS, FS, and FM vs. the inorganic filler by wt. % and vol. %. (R2 = 0.8899–0.9483). The highest regression was obtained for the FM values vs. vol. %. SEM images of the tested FRCs showed hybrid inorganic filler for Filtek Supreme XT (A3) and StarFlow (A2) and a homogeneous type of inorganic filler for the other investigated materials. All of the FS values were above 50 MPa, the ISO 4049/2019 limit for FRCs.

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Section: Introductionmentioning

confidence: 99%

Influence of Filler Loading on the Mechanical Properties of Flowable Resin Composites

et al. 2020

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“…It is possible that CNT addition may hinder the polymer-polymer bonding and promote polymer-CNT-polymer bonding and increasing its mechanical and thermal properties [5]. A relationship is observed between glass transition temperature(Tg) and degree of curing, hence differential scanning calorimetry(DSC) is done to evaluate Tg [6]. To evaluate changes in mechanical properties, flexural testing is done.…”

Section: Introductionmentioning

confidence: 99%

Effect of CNT addition on cure kinetics of glass fiber/epoxy composite

Fulmali

Kattaguri

Mahato

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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In present time, developments in reinforced polymer composites have acquired preferential attention for high performance and high precision applications like aerospace, marine and transportation. Fibre reinforced polymer (FRP) composites are being substituted because of their low density, higher strength, stiffness, impact resistance, and improved corrosion resistance. Further laminated composites exhibit superior in-plane mechanical properties that are mostly governed by the fibers. However, laminated FRP composites suffer from poor out of plane properties in some applications. These properties can further be improved by the addition of Nano fillers like carbon nanotube (CNT), graphene and so on. Curing cycle plays a very important role in drawing out the optimum property of glass fiber/epoxy (GE) composite. It is expected that the cure kinetics can further be altered by addition of CNT due to its higher aspect ratio. The main objective of this work is to study the effect of CNT addition on cure kinetics of GE composite as multi-segment adsorption of polymer takes place on the CNT surface. In this study effects of curing parameters on mechanical properties and glass transition temperature of CNT embedded glass fiber/epoxy composite (CNT-GE) has been evaluated. For this study control GE and CNT-GE (with 0.1 wt. %) laminates were fabricated using hand lay-up technique followed by hot compression. The curing parameters that were considered in the present investigation were temperature (80°C, 110°C, and 140°C) and time (0.5 hr, 3 hr and 6 hr). For different combination of above mentioned temperature and time, samples of GE and CNT-GE composites were post cured.

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“…As stated by Bagis and Rueggeberg, the amount of unreacted double bonds significantly decreased by heating the cured materials after the light‐curing stage. Many researchers detected improved physical properties as a result of the postcuring heating process, such as enhanced surface hardness, tensile strength, flexural strength, color stability, and glass transition temperature . However, it is very difficult and expensive on an industrial scale to heat the sample in such high temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers detected improved physical properties as a result of the postcuring heating process, such as enhanced surface hardness, tensile strength, flexural strength, color stability, and glass transition temperature. [26][27][28] However, it is very difficult and expensive on an industrial scale to heat the sample in such high temperature. More importantly, heating at high temperature can deform the base materials and volatilize the components in the cured samples.…”

Section: Introductionmentioning

confidence: 99%

The effect of solvent on postcuring in free radical photopolymerization

Zhang

Nie

Muhyodin

et al. 2016

J of Applied Polymer Sci

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During free radical photopolymerization, with an increasing degree of conversion, the viscosity increased and vitrification occurred. The unreacted double bonds had difficulty diffusing to the reactive site in the vitrifying polymer. However, the free radicals generated in the vitrifying matrix could survive for a long time. Thus, the postcuring process occurred. In this study, free radical photopolymerization kinetics of methacrylate with or without solvent was investigated by real‐time FTIR, which was combined with a heating device. Results showed that without solvent, postcuring occurred only by heating at a higher temperature than the glass transition temperature of the polymer. However, with solvent, the postcuring occurred even at room temperature, where only a small amount of solvent was enough to cause postcuring. The lifespan of the free radicals inside the polymer was over 10 h. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44223.

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Influence of filler/reinforcing agent and post-curing on the flexural properties of woven and unidirectional glass fiber-reinforced composites

Cited by 24 publications

References 34 publications

Influence of Filler Loading on the Mechanical Properties of Flowable Resin Composites

Influence of Filler Loading on the Mechanical Properties of Flowable Resin Composites

Effect of CNT addition on cure kinetics of glass fiber/epoxy composite

The effect of solvent on postcuring in free radical photopolymerization

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