Filler reinforcement in silicone polymers

Thomas, D. K.; Moore, B. B.

doi:10.1016/s0032-3861(72)80004-1

Cited by 13 publications

(6 citation statements)

References 3 publications

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“…Commonly employed fillers include silica (fumed, colloidal), carbon black, and diatomaceous earth. The incorporation of sub-micron-sized particulate filler significantly improves mechanical properties and increases abrasion resistance in rubbery networks [ 13 ]. Without filler, silicone vulcanites are extremely soft and weak and have limited use in mechanical applications.…”

Section: Introductionmentioning

confidence: 99%

“…As examples, this may include endowing a material with UV-reactive functional groups for a stereolithography (SLA) process [8] or formulating with thixotropic additives to facilitate direct ink writing (DIW) [9]. Here, we have approached this problem by co-developing Polymers 2021, 13, 2239 2 of 15 a UV-curable silicone elastomer with the build of an SLA printer specifically designed to handle the viscous nature of reinforced silicone resin.…”

Section: Introductionmentioning

confidence: 99%

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3D Printing of High Viscosity Reinforced Silicone Elastomers

et al. 2021

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Recent advances in additive manufacturing, specifically direct ink writing (DIW) and ink-jetting, have enabled the production of elastomeric silicone parts with deterministic control over the structure, shape, and mechanical properties. These new technologies offer rapid prototyping advantages and find applications in various fields, including biomedical devices, prosthetics, metamaterials, and soft robotics. Stereolithography (SLA) is a complementary approach with the ability to print with finer features and potentially higher throughput. However, all high-performance silicone elastomers are composites of polysiloxane networks reinforced with particulate filler, and consequently, silicone resins tend to have high viscosities (gel- or paste-like), which complicates or completely inhibits the layer-by-layer recoating process central to most SLA technologies. Herein, the design and build of a digital light projection SLA printer suitable for handling high-viscosity resins is demonstrated. Further, a series of UV-curable silicone resins with thiol-ene crosslinking and reinforced by a combination of fumed silica and MQ resins are also described. The resulting silicone elastomers are shown to have tunable mechanical properties, with 100–350% elongation and ultimate tensile strength from 1 to 2.5 MPa. Three-dimensional printed features of 0.4 mm were achieved, and complexity is demonstrated by octet-truss lattices that display negative stiffness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3D Printing of High Viscosity Reinforced Silicone Elastomers

et al. 2021

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“…11,12 Several studies on the doping of silicone rubber have been reported. [13][14][15][16][17][18] Conductive fillers, such as carbon, [19][20][21][22][23] metal, 24 and conductive polymer, 25 have also been used to impart electrical conductivity to silicone rubber. In most previous works, the morphology of the filler materials were spherical, 6,13,14,19,24,25 tubular, [2][3][4][5][6][7]10,16,20,21,23 or flaky.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous silica as smart inorganic filler: preparation of robust silicone rubber with low thermal expansion property

et al. 2011

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“…In order to improve thermal stability of these materials, various amounts and types of inorganic fillers are added, sometimes also to tune optical properties such as refractive index . The amount of filler used is often limited by changes of properties relevant for the corresponding application such as increased viscosity or mechanical properties (brittleness) when operating at high particle concentrations . At filler grades below the percolation threshold the thermal conductivity of filled silicones are mostly unchanged in accordance to their unfilled values (0.1–0.3 W m −1 K −1 ) .…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of filled sol‐gel‐derived hybrid materials

Pihale

Eder

Kroke

2014

J of Applied Polymer Sci

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A novel sol‐gel‐based hybrid material has been synthesized from organofunctional silanes and aluminates via hydrolysis and condensation reactions. The hybrid material was—in comparison to a silicone rubber—filled with equal amounts of metal filler particles in order to investigate the effective thermal conductivity. The data obtained were compared with theoretical models available in literature to gain understanding of mechanisms responsible for the measured conductivities. Samples were prepared via casting and spin‐coating techniques on Teflon® and silicon substrates and characterized using laser flash analysis (LFA) and scanning electron microscopy (SEM). It was demonstrated, that the hybrid material with an aluminum content of 40 vol % offers the possibility to achieve an up to five times higher thermal conductivity than filled silicone references. The influence of thermal transition between matrix material and filler was evaluated by a sandwich‐layer setup. The results suggest that increased thermal conductivity is also caused by the lower thermal resistance and improved interphase connections within the hybrid material. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41037.

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Filler reinforcement in silicone polymers

Cited by 13 publications

References 3 publications

3D Printing of High Viscosity Reinforced Silicone Elastomers

3D Printing of High Viscosity Reinforced Silicone Elastomers

Mesoporous silica as smart inorganic filler: preparation of robust silicone rubber with low thermal expansion property

Thermal conductivity of filled sol‐gel‐derived hybrid materials

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