Mechanical Behavior of Polymers

Sperling, L. H.

doi:10.1002/0471757128.ch11

Cited by 4 publications

(1 citation statement)

References 48 publications

(84 reference statements)

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“…Control of the phase-separation structure in polymer alloys is an alternative method to tune the physical properties of polymeric materials such as acrylonitrile-butadiene-styrene (ABS: sea–island structure) resin and high-impact-resistant polystyrene (HIPS: salami structure) . However, materials with a phase-separated structure have material properties that random copolymers made by simple monomer blending do not have.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional 3D Printing of Heterogeneous Polymer Structures by Laser-Scanning Micro-Stereolithography Using Reversible Addition–Fragmentation Chain-Transfer Polymerization

Maruyama

Mukai

Sato

et al. 2022

ACS Appl. Polym. Mater.

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Stereolithography is the most precise three-dimensional (3D) printing technology and has been applied to various applications with various photocurable materials. However, most 3D-printed objects produced using conventional methods are made of uniform materials, limiting their functions. In this study, to produce heterogeneous 3D-printed objects, microphase-separated structures were controlled by the copolymerization of a photoinduced macro-reversible addition−fragmentation chain-transfer (macro-RAFT) agent and a monomer at different scanning speeds of an ultraviolet laser beam using a laboratory-constructed laserscanning micro-stereolithography system based on a bottom-up configuration in a fully open-to-air system. First, we demonstrated 3D printing using a RAFT agent by fabricating a pyramidal structure using a 375 nm laser. Copolymerization with styrene was performed to confirm that the synthesized poly(butyl acrylate) with dormant species at the end (DTC-PBA) formed block polymers upon photoirradiation. Nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC) results indicated the formation of a block polymer. A homogeneous photocurable resin was prepared by mixing the synthesized DTC-PBA with multifunctional monomers, and 3D printing was performed using the prepared photocurable resin at different scanning speeds. As the scanning speed increased, the transparency of the 3D-printed model increased, whereas the mechanical strength decreased. It was suggested from scanning probe microscopy (SPM) observations that these differences were due to differences in the microphase-separation structure. As a result, it was demonstrated that heterogeneous 3D structures with sites have different mechanical and optical properties from those of a single material. Controlling the physical properties of 3D-printed parts by controlling the laser irradiation conditions is useful for functionalizing 3D-printed microdevices.

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Section: Introductionmentioning

confidence: 99%

Multifunctional 3D Printing of Heterogeneous Polymer Structures by Laser-Scanning Micro-Stereolithography Using Reversible Addition–Fragmentation Chain-Transfer Polymerization

Maruyama

Mukai

Sato

et al. 2022

ACS Appl. Polym. Mater.

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Volumetric Printing of Thiol‐Ene Photo‐Cross‐Linkable Poly(ε‐caprolactone): A Tunable Material Platform Serving Biomedical Applications

et al. 2023

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Current thoroughly described biodegradable and cross‐linkable polymers mainly rely on acrylate cross‐linking. However, despite the swift cross‐linking kinetics of acrylates, the concomitant brittleness of the resulting materials limits their applicability. Here, photo‐cross‐linkable poly(ε‐caprolactone) networks through orthogonal thiol‐ene chemistry are introduced. The step‐growth polymerized networks are tunable, predictable by means of the rubber elasticity theory and it is shown that their mechanical properties are significantly improved over their acrylate cross‐linked counterparts. Tunability is introduced to the materials, by altering Mc (or the molar mass between cross‐links), and its effect on the thermal properties, mechanical strength and degradability of the materials is evaluated. Moreover, excellent volumetric printability is illustrated and the smallest features obtained via volumetric 3D‐printing to date are reported, for thiol‐ene systems. Finally, by means of in vitro and in vivo characterization of 3D‐printed constructs, it is illustrated that the volumetrically 3D‐printed materials are biocompatible. This combination of mechanical stability, tunability, biocompatibility, and rapid fabrication by volumetric 3D‐printing charts a new path toward bedside manufacturing of biodegradable patient‐specific implants.

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A facile approach towards high-performance poly(thioether-thioester)s with full recyclability

Dai

Xiong²,

Du³

et al. 2022

Sci. China Chem.

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Mechanical Behavior of Polymers

Cited by 4 publications

References 48 publications

Multifunctional 3D Printing of Heterogeneous Polymer Structures by Laser-Scanning Micro-Stereolithography Using Reversible Addition–Fragmentation Chain-Transfer Polymerization

Multifunctional 3D Printing of Heterogeneous Polymer Structures by Laser-Scanning Micro-Stereolithography Using Reversible Addition–Fragmentation Chain-Transfer Polymerization

Volumetric Printing of Thiol‐Ene Photo‐Cross‐Linkable Poly(ε‐caprolactone): A Tunable Material Platform Serving Biomedical Applications

A facile approach towards high-performance poly(thioether-thioester)s with full recyclability

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