ArticleDental materials : official publication of the Academy of Dental Materials2014
RAFT-mediated control of nanogel structure and reactivity: chemical, physical and mechanical properties of monomer-dispersed nanogel compositions.
Article in Dental materials : official publication of the Academy of Dental Materials, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 22 citations in OpenAlex.
- Cytotoxic Evaluation and Determination of Organic and Inorganic Eluates from Restorative Materials.Molecules (Basel, Switzerland) · 2021Article
- Synthesis of Nanogels: Current Trends and Future Outlook.Gels (Basel, Switzerland) · 2021Review
- Organic Eluates Derived from Intermediate Restorative Dental Materials.Molecules (Basel, Switzerland) · 2020Article
- Recent Advances in RAFT Polymerization: Novel Initiation Mechanisms and Optoelectronic Applications.Polymers · 2018Review
- Controlled nanogel and macrogel structures from self-assembly of a stimuli-responsive amphiphilic block copolymer.RSC advances · 2016Article
- Article
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Authors and funding
2 authors at 2 institutions in 1 country.
Funding
Abstract
objectiveThis study examines how nanogel structure correlates with photopolymerization and key polymer properties upon addition of nanogels with latent reactivity into a monomer dispersant to produce polymer/polymer composites.
methodsTwo nanogels that retained RAFT functionality based on the synthetic approach were prepared to have different branching densities. These reactive nanogels were dispersed in triethylene glycol dimethacrylate at 0-40 wt%. Reaction kinetics, volumetric shrinkage and shrinkage stress associated with the photopolymerization of nanogel-modified formulations were measured in real time with mechanical properties of the polymers also evaluated. The basic structure of RAFT-derived nanogel particles was examined by the preparation of a separate nanogel constructed with degradable disulfide crosslinking groups. The model nanogel molecular weight and polydispersity were compared before and after degradation.
resultsDespite the controlled radical synthetic approach, the nanogels, which are composed of multiple interconnected, short primary chains, presented relatively high polydispersity. Through addition of the reactive nanogels to a monomer that both infiltrates and disperses the nanogels, the photopolymerization rate was moderately reduced with the increase of nanogel loading levels. Volumetric shrinkage decreased proportionally with nanogel concentration; however, a greater than proportional reduction of polymerization-induced stress was observed. Mechanical properties, such as flexural strength, storage modulus were maintained at the same levels as the control resin for nanogel systems up to 40 wt%. SIGNIFICANCE: This study demonstrated that beyond the use of RAFT functionality to produce discrete nano-polymeric structures, the residual chain end groups are important to maintain reactivity and mechanical properties of nanogel-modified resin materials.
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Registered trials
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