Highly Flexible and Photo-Activating Acryl-Polyurethane for 3D Steric Architectures

Highly Flexible and Photo-Activating Acryl-Polyurethane for 3D Steric Architectures

An acryl-functionalized polyurethane (PU) series was successfully synthesized using poly(tetramethylene ether) glycol-methylene diphenyl diisocyanate (PTMG-MDI) oligomer based on urethane methacrylates to control the flexibility of photo-cured 3D printing architectures. The mass ratio of acryl-ureth...

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Published in:Polymers Vol. 13; no. 6; p. 844
Main Authors: Bae, Ji-Hong, Won, Jong Chan, Lim, Won Bin, Lee, Ju Hong, Min, Jin Gyu, Kim, Si Woo, Kim, Ji-Hyo, Huh, PilHo
Format: Journal Article
Language:English
Published: Switzerland MDPI 10-03-2021
Subjects:
photopolymer
digital light processing
three-dimensional printing architectures
photocurable resin
acryl-polyurethane
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Abstract An acryl-functionalized polyurethane (PU) series was successfully synthesized using poly(tetramethylene ether) glycol-methylene diphenyl diisocyanate (PTMG-MDI) oligomer based on urethane methacrylates to control the flexibility of photo-cured 3D printing architectures. The mass ratio of acryl-urethane prepolymer: 1,4-butanediol (BD) chain-extender: diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO) photoinitiator was 10:0.25:1. To produce suitably hard and precisely curved 3D architectures, the optimal UV absorbance and exposure energy of the acryl-PTMG-MDI resin were controlled precisely. Owing to the optimized viscosity of the acryl-PTMG-MDI resins, they could be printed readily by digital light processing (DLP) to form precisely curved 3D architectures after mixing with 1,6-hexanediol diacrylate (HDDA). The acryl-PTMG-MDI formulations showed much better flexural resolution than the neat resins. The printed 3D structure exhibited high surface hardness, good mechanical strength, and high elasticity for flexible applications in consumer/industrial and biomedical fields.
AbstractList An acryl-functionalized polyurethane (PU) series was successfully synthesized using poly(tetramethylene ether) glycol-methylene diphenyl diisocyanate (PTMG-MDI) oligomer based on urethane methacrylates to control the flexibility of photo-cured 3D printing architectures. The mass ratio of acryl-urethane prepolymer: 1,4-butanediol (BD) chain-extender: diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO) photoinitiator was 10:0.25:1. To produce suitably hard and precisely curved 3D architectures, the optimal UV absorbance and exposure energy of the acryl-PTMG-MDI resin were controlled precisely. Owing to the optimized viscosity of the acryl-PTMG-MDI resins, they could be printed readily by digital light processing (DLP) to form precisely curved 3D architectures after mixing with 1,6-hexanediol diacrylate (HDDA). The acryl-PTMG-MDI formulations showed much better flexural resolution than the neat resins. The printed 3D structure exhibited high surface hardness, good mechanical strength, and high elasticity for flexible applications in consumer/industrial and biomedical fields.
Author Kim, Ji-Hyo
Lim, Won Bin
Won, Jong Chan
Huh, PilHo
Lee, Ju Hong
Min, Jin Gyu
Kim, Si Woo
Bae, Ji-Hong
AuthorAffiliation Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, Korea; jihong.bae@pusan.ac.kr (J.-H.B.); jcwon@pusan.ac.kr (J.C.W.); freewonbin@nate.com (W.B.L.); dlwnghd15@pusan.ac.kr (J.H.L.); jg_min0629@naver.com (J.G.M.); siwoo3072@pusan.ac.kr (S.W.K.); sefg1530@naver.com (J.-H.K.)
AuthorAffiliation_xml – name: Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, Korea; jihong.bae@pusan.ac.kr (J.-H.B.); jcwon@pusan.ac.kr (J.C.W.); freewonbin@nate.com (W.B.L.); dlwnghd15@pusan.ac.kr (J.H.L.); jg_min0629@naver.com (J.G.M.); siwoo3072@pusan.ac.kr (S.W.K.); sefg1530@naver.com (J.-H.K.)
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Keywords photopolymer
digital light processing
three-dimensional printing architectures
photocurable resin
acryl-polyurethane
Language English
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