Impact Properties of Thiol–Ene Networks

McNair, Olivia; Janisse, Andrew P.; Krzemiński, D; Brent, Davis E.; Gould, Trenton E.; Rawlins, James W.; Savin, Daniel A.

doi:10.1021/am403238g

Cited by 28 publications

(30 citation statements)

References 30 publications

(68 reference statements)

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“…However, consumption of onium salt by this mechanism does not seem to affect the sol-gel progress. Evidence of sol-gel condensation in the two nanocomposite thiol-ene films was indeed provided by 29 Si solid-state NMR. Figure 5 displays the quantitative 29 Si SPE-MAS NMR spectra of the two E 1 -T and E 2 -T nanocomposite films.…”

Section: Characterizationmentioning

confidence: 85%

“…Evidence of sol-gel condensation in the two nanocomposite thiol-ene films was indeed provided by 29 Si solid-state NMR. Figure 5 displays the quantitative 29 Si SPE-MAS NMR spectra of the two E 1 -T and E 2 -T nanocomposite films. In both systems, the broad resonances at -48, -57 and -69 ppm were straightforwardly assigned to (XO) 2 …”

Section: Characterizationmentioning

confidence: 85%

“…All spectra were baseline corrected prior to integration with the software OPUS 6.5. To obtain quantitatively reliable 29 Si and 13 C solid state NMR spectra, single pulse magic angle spinning (SPE-MAS) experiments were performed on a Bruker Avance II 400 spectrometer operating at 79.48 and 100.6 MHz respectively with a Bruker double channel 7 mm probe. Spectra were recorded using a pulse angle of #/4, a recycling delay of 80 and 60 s respectively, a spinning frequency of 4 or 5 kHz and highpower proton decoupling during the acquisition.…”

Section: Characterizationmentioning

confidence: 99%

“…Spectra were recorded using a pulse angle of #/4, a recycling delay of 80 and 60 s respectively, a spinning frequency of 4 or 5 kHz and highpower proton decoupling during the acquisition. 29 Si and 13 C chemical shifts are both relative to tetramethylsilane. Deconvolution of the spectrum was performed using Dmfit software [26].…”

Section: Characterizationmentioning

confidence: 99%

“…There is a vast array of work on the mechanical properties of thiol-ene networks [28][29][30]. However, the majority is focused on homogeneity in the network crosslink density reflected by a narrowing of the loss tangent peak measured via dynamic mechanical analysis [31].…”

Section: Mechanical Characterizationmentioning

confidence: 99%

See 4 more Smart Citations

An orthogonal, one-pot, simultaneous UV-mediated route to thiol-ene/sol-gel film

Chemtob¹,

Paz-Simon²,

Sibeaud³

et al. 2016

Express Polym. Lett.

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Abstract. We describe a novel combination of orthogonal reactions based on UV-driven thiol-ene and alkoxysilyl condensation reactions to form a single-step route toward thioether-bridged silsesquioxane films. Our chemical strategy consists of using two bifunctional (meth)acrylate (E) and propanethiol (T) trimethoxysilyl precursors containing two complementary functional moieties for thiol-ene coupling and sol-gel process. The reaction kinetics revealed that c.a. 85% of thiol and ene conversions were consumed concomitantly. Meanwhile, a complete hydrolysis was accomplished, affording ultimately a high degree of condensation (81%). Emphasis was placed on differences of mechanical properties between sol-gel hybrids resulting from thiol-ene reaction (E-T mixture) and ene homopolymerization (E only) using scratch test measurements. For the methacrylate system, the formation of thioether linkages within a vitreous silica network emerged as a useful strategy for the formation of a uniform, low-stress and flexible crosslinked hybrid structure. Enhanced mechanical properties were manifested by an expanded elastic domain, and better resistance to cracking. Moreover, there are clear indications that mechanical properties can be easily tuned upon varying the ratio of the two hybrid precursors.

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Section: Characterizationmentioning

confidence: 85%

Section: Characterizationmentioning

confidence: 85%

Section: Characterizationmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Mechanical Characterizationmentioning

confidence: 99%

See 3 more Smart Citations

An orthogonal, one-pot, simultaneous UV-mediated route to thiol-ene/sol-gel film

Chemtob¹,

Paz-Simon²,

Sibeaud³

et al. 2016

Express Polym. Lett.

View full text Add to dashboard Cite

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Characterization of mouthguard materials: A comparison of a commercial material to a novel thiolene family

McNair

Gould

Piland

et al. 2014

J of Applied Polymer Sci

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The goal of this study is to compare the thermal and mechanical properties of a commercial mouthguard material with a novel class of thermoset polymers based on thiolene "click" chemistry. Ternary thiolene systems modified with urethane or acrylate [urethane-modified thiolene network (UMTEN) and acrylate-modified thiolene network (AMTEN), respectively] were synthesized and their properties compared with commercially available Polyshok TM . Durometer hardness (ASTM D2240-05), water absorption [ASTM D570-98 (2005)], tear strength (ASTM D624-00), and impact attenuation [ASTM D6110-06f (modified)] were measured for physical property comparison. Differential scanning calorimetry and dynamic mechanical analysis were used as a means to compare thermal properties. One-way analysis of variance and independent t tests were used to test for differences between Polyshok TM , AMTEN and UMTEN samples. It was found that the novel thiolene networks exhibit higher impact attenuation at intraoral temperature compared with Polyshok TM , although Polyshok TM demonstrates lower water absorption and hardness, as well as higher tear strength. With further modification, this family of thiolene materials may provide a platform for developing next-generation mouthguard materials.

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Antimicrobial cytocompatible pentaerythritol triacrylate‐co‐trimethylolpropane composite scaffolds for orthopaedic implants

Smoak

Chen

Qureshi

et al. 2014

J of Applied Polymer Sci

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As of 2010, 5.3 million orthopedic surgeries are performed each year, and this number is expected to increase to 6.2 million by 2020. On average, 27.7% of all orthopedic surgeries result in infection which often leads to osteomyelitis and the loss of supporting bone. In this study, we describe two synthetic bone grafts, or augmentation methods, for a biodegradable, silver nanoparticle (SNPs) containing antimicrobial scaffolds composed of pentaerythritol triacrylate‐co‐trimethylolpropane tris (3‐mercaptopropionate) (PETA) and hydroxyapatite (HA). This osteoinductive and degradable material is designed to stimulate proliferation of bone progenitor cells, and provide controlled release of antimicrobial components. The first method, denoted as the “incorporating method,” involves dissolving SNPs in ethanol, butanol, or isopropanol and directly incorporating the particles into the scaffold prior to polymerization. The second method, “coating method,” involves submerging fabricated scaffolds into their respective SNPs‐solution and mixing for 24 h. The coating method allowed better distribution and release of SNPs from the surface of the composites when exposed to extracellular media. The in vitro release of silver for both methods was quantified by inductively coupled plasma optical emission spectroscopy (ICP‐OES). The scaffolds made by means of the coating method showed increased release of silver with respect to time; no silver leached from the scaffolds formed by the incorporating method. Use of Alamar Blue assay demonstrated that the SNPs incorporation did not affect cell viability when tested with hASCs. The scaffolds formed by the coating method inhibited the proliferation of Staphylococcus aureus 99.5% and Escherichia coli by 99.9% within 24 h. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41099.

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Impact Properties of Thiol–Ene Networks

Cited by 28 publications

References 30 publications

An orthogonal, one-pot, simultaneous UV-mediated route to thiol-ene/sol-gel film

An orthogonal, one-pot, simultaneous UV-mediated route to thiol-ene/sol-gel film

Characterization of mouthguard materials: A comparison of a commercial material to a novel thiolene family

Antimicrobial cytocompatible pentaerythritol triacrylate‐co‐trimethylolpropane composite scaffolds for orthopaedic implants

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