PMID- 35683876
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220716
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 14
IP  - 11
DP  - 2022 May 29
TI  - Room-Temperature Solid-State UV Cross-Linkable Vitrimer-like Polymers for 
      Additive Manufacturing.
LID - 10.3390/polym14112203 [doi]
LID - 2203
AB  - In this paper, a UV cross-linkable vitrimer-like polymer, ureidopyrimidinone 
      functionalized telechelic polybutadiene, is reported. It is synthesized in two 
      steps. First, 2(6-isocyanatohexylaminocarbonylamino)-6-methyl-4[1H]-pyrimidinone 
      (UPy-NCO) reacts with hydroxy-functionalized polybutadiene (HTPB) to obtain 
      UPy-HTPB-UPy, and then the resulted UPy-HTPB-UPy is cross-linked under 365 nm UV 
      light (photo-initiator: bimethoxy-2-phenylacetophenone, DMPA). Further 
      investigation reveals that the density of cross-linking and mechanical properties 
      of the resulting polymers can be tailored via varying the amount of 
      photo-initiator and UV exposure time. Before UV cross-linking, UPy-HTPB-UPy is 
      found to be vitrimer-like due to the quadruple hydrogen-bonding interactions. The 
      UPy groups at the end of the chain also enable for rapid solidification upon the 
      evaporation of the solvent. The unsaturated double bonds in the HTPB chains 
      enable UPy-HTPB-UPy to be UV cross-linkable in the solid state at room 
      temperature. After cross-linking, the polymers have good shape memory effect 
      (SME). Here, we demonstrate that this type of polymer can have many potential 
      applications in additive manufacturing. In the cases of fused deposition 
      modelling (FDM) and direct ink writing (DIW), not only the strength of the 
      interlayer bonding but also the strength of the polymer itself can be enhanced 
      via UV exposure (from thermoplastic to thermoset) either during printing or after 
      printing. The SME after cross-linking further helps to achieve rapid volumetric 
      additive manufacturing anytime and anywhere.
FAU - Chen, Jian
AU  - Chen J
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
FAU - Wen, Ya
AU  - Wen Y
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
FAU - Zeng, Lingyi
AU  - Zeng L
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
FAU - Wang, Xinchun
AU  - Wang X
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
FAU - Chen, Hongmei
AU  - Chen H
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
FAU - Huang, Wei Min
AU  - Huang WM
AUID- ORCID: 0000-0002-6691-3369
AD  - School of Mechanical and Aerospace Engineering, Nanyang Technological University, 
      Singapore 639798, Singapore.
FAU - Bai, Yuefeng
AU  - Bai Y
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
FAU - Yu, Wenhao
AU  - Yu W
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
FAU - Zhao, Keqing
AU  - Zhao K
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
FAU - Hu, Ping
AU  - Hu P
AD  - College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 
      610066, China.
LA  - eng
GR  - 51973143/National Natural Science Foundation of China/
GR  - 52103346/National Natural Science Foundation of China/
PT  - Journal Article
DEP - 20220529
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC9182850
OTO - NOTNLM
OT  - additive manufacturing
OT  - cross-linking
OT  - shape memory effect
OT  - vitrimer
COIS- The authors declare no conflict of interest.
EDAT- 2022/06/11 06:00
MHDA- 2022/06/11 06:01
PMCR- 2022/05/29
CRDT- 2022/06/10 01:21
PHST- 2022/04/15 00:00 [received]
PHST- 2022/05/24 00:00 [revised]
PHST- 2022/05/24 00:00 [accepted]
PHST- 2022/06/10 01:21 [entrez]
PHST- 2022/06/11 06:00 [pubmed]
PHST- 2022/06/11 06:01 [medline]
PHST- 2022/05/29 00:00 [pmc-release]
AID - polym14112203 [pii]
AID - polymers-14-02203 [pii]
AID - 10.3390/polym14112203 [doi]
PST - epublish
SO  - Polymers (Basel). 2022 May 29;14(11):2203. doi: 10.3390/polym14112203.