Partially Cured Photopolymer with Gradient Bingham Plastic Behaviors as a Versatile Deformable Material

Rhokyun Kwak, Hyun Ha Park, Hangil Ko, Minho Seong, Moon Kyu Kwak, Hoon Eui Jeong

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We present rheological and mechanical behaviors of a partially cured photopolymer. When an ultraviolet (UV)-curable resin is exposed to UV light in atmospheric conditions, a partially cured layer is formed on the top of the resin owing to inhibitory effects of oxygen. Interestingly, such a partially cured resin behaves like a Bingham plastic with a yield stress, being a rigid solid at low shear stress and a viscous liquid at high stress. Unlike typical Bingham plastic materials, however, deformation rate saturation is observed with an increase in applied stress, which is attributed to the gradient in the degree of photopolymerization of the resin (termed “gradient Bingham plastic”). This gradient Bingham plastic can be utilized for the robust fabrication of diverse 3D, multiscale structures.

Original languageEnglish
Pages (from-to)561-565
Number of pages5
JournalACS Macro Letters
Volume6
Issue number5
DOIs
StatePublished - 2017 May 16

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Photopolymers
Resins
Plastics
Photopolymerization
Yield stress
Shear stress
Oxygen
Fabrication
Liquids

Cite this

Kwak, Rhokyun ; Park, Hyun Ha ; Ko, Hangil ; Seong, Minho ; Kwak, Moon Kyu ; Jeong, Hoon Eui. / Partially Cured Photopolymer with Gradient Bingham Plastic Behaviors as a Versatile Deformable Material. In: ACS Macro Letters. 2017 ; Vol. 6, No. 5. pp. 561-565.
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Partially Cured Photopolymer with Gradient Bingham Plastic Behaviors as a Versatile Deformable Material. / Kwak, Rhokyun; Park, Hyun Ha; Ko, Hangil; Seong, Minho; Kwak, Moon Kyu; Jeong, Hoon Eui.

In: ACS Macro Letters, Vol. 6, No. 5, 16.05.2017, p. 561-565.

Research output: Contribution to journalArticle

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