Evaluation of rheological behaviour of flowable dental composites reinforced with low aspect ratio micro-sized glass fibres

Behl, Sonam; Farahani, Abbas Darestani; Raju, Raju; Rajan, Ginu; Ellakwa, Ayman; Farrar, Paul; Thordarson, Pall; Prusty, B. Gangadhara

doi:10.1016/j.dental.2020.10.023

Cited by 11 publications

(8 citation statements)

References 33 publications

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“…gradual decrease in the viscosity as the shear rate and frequency increase). This finding is in agreement with those reported previously for different types of resin-based composites [ 14 , 15 , 19 ] including fibre-reinforced resin composites [ 17 ]. Most filled materials typically exhibit non-Newtonian flow behavior [ 20 ], which can be attributed either to the mode of the filler particles alignment in the direction of the flow or to the shear-thinning behavior of the resin matrix itself [ 21 ].…”

Section: Discussionsupporting

confidence: 94%

“…This finding demonstrates the effect of only one filler characteristic (volume fraction) on the viscosity of nano-flowable composites; however, other filler characteristics such as type, size, shape, salinization, and distribution may also affect the viscosity levels of resin composites [ 17 ]. Particle size distribution (PSD) is an important parameter that affects the viscosity of composite materials.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, it has been reported that the filler type (e.g. spherical particles or rod fibres) considerably affects the viscoelastic properties of RBCs [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Comparative evaluation of rheological characteristics of giomers and other nano-flowable resin composites in vitro

Al‐Saud

2021

Biomaterial Investigations in Dentistry

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

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Comparative evaluation of rheological characteristics of giomers and other nano-flowable resin composites in vitro

Al‐Saud

2021

Biomaterial Investigations in Dentistry

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“…The mean L/D ratio difference between as-MCC and c-MCC, equal to 6.9 and 4.3, respectively ( Table 1 ), can furtherly explain the peculiar rheological behavior of PBAT/as-MCC 20% composite reported in Figure 1 A. In fact, small and elongated fillers in a polymeric melt are able to get structured in a three-dimensional network at lower concentrations than particles characterized by lower L/D aspect ratio [ 42 ].…”

Section: Resultsmentioning

confidence: 78%

PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells

et al. 2021

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This study explores the processability, mechanical, and thermal properties of biocompostable composites based on poly (butylene adipate-co-terephthalate) (PBAT) as polymer matrix and microcrystalline cellulose (MCC) derived from softwood almond (Prunus dulcis) shells (as-MCC) as filler at two different weight concentration, i.e., 10 wt% and 20 wt%. The materials were processed by melt mixing and a commercial MCC (c-MCC) was used as filler comparison. The fibrillar shape of as-MCC particles was found to change the rheological behavior of PBAT, particularly at the highest concentration. The melt mixing processing allowed obtaining a uniform dispersion of both kinds of fillers, slightly reducing the L/D ratio of as-MCC fibers. The as-MCC particles led to a higher increase of the elastic modulus of PBAT if compared to the c-MCC counterparts. Both the MCC fillers caused a drastic reduction of the elongation at break, although it was higher than 120% also at the highest filler concentrations. DSC analysis revealed that both MCC fillers poorly affected the matrix crystallinity, although as-MCC induced a slight PBAT crystallinity increase from 8.8% up to 10.9% for PBAT/as-MCC 20%. Therefore, this work demonstrates the great potential of MCC particles derived from almond shells as filler for biocompostable composites fabrication.

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“…Axes 1 and 2 of the 1‐2‐ z system represent the longitudinal and transverse direction of layout respectively. [ 17 ] Together, these 1–2 directions are the primary directions of the laminas. For the loading directions are the x and y axes; the fiber orientation is at an angle of θ , existing between the positive 1 axis and x‐axis.…”

Section: Methodsmentioning

confidence: 99%

An experimental investigation on impact dynamics response of woven roved glass fiber reinforced polyester laminated composites

Balasubramani¹,

Boopathy

Stalin

et al. 2022

Polymer Composites

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This research deals with the effect of stacking sequence over, the mechanical behavior of laminates that includes tensile, flexural, fractography, area of impact damage, and residual tensile strength. The angle‐ply laminate specimens were analyzed theoretically and correlated with experimental results. The highest interlaminar shear strength 32.89 MPa was exhibited by (60/30/60/30)S with better transverse stiffness of 444 N/mm. Among the developed laminates, (60/30/60/30)S showed the highest rate of residual strength degradation of 0.271. It has been found that an increase in interlaminar shear strength decreases the impact damage resistance of the composites. The angle‐ply laminate composites exhibited superior residual tensile and impact resistant properties when compared with uniply laminate composites.

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Evaluation of rheological behaviour of flowable dental composites reinforced with low aspect ratio micro-sized glass fibres

Cited by 11 publications

References 33 publications

Comparative evaluation of rheological characteristics of giomers and other nano-flowable resin composites in vitro

Comparative evaluation of rheological characteristics of giomers and other nano-flowable resin composites in vitro

PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells

An experimental investigation on impact dynamics response of woven roved glass fiber reinforced polyester laminated composites

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