A simple strategy toward the substitution of styrene by sobrerol-based monomers in unsaturated polyester resins

2018 ◽  
Vol 20 (21) ◽  
pp. 4880-4890 ◽  
Author(s):  
Mafalda S. Lima ◽  
Cátia S. M. F. Costa ◽  
Jorge F. J. Coelho ◽  
Ana C. Fonseca ◽  
Arménio C. Serra
Keyword(s):  
Unsaturated Polyester ◽  
Polyester Resins ◽  
Unsaturated Polyesters ◽  
Unsaturated Polyester Resins ◽  
Simple Strategy

New sobrerol-based monomers were successfully used as styrene substitutes to crosslink unsaturated polyesters.

Fabrication of 3D scaffolds based on fully biobased unsaturated polyester resins by microstereo-lithography

2022 ◽  
Author(s):  
Filipa A. M. M. Gonçalves ◽  
Ana Fonseca ◽  
Rosemeyre Cordeiro ◽  
Ana Piedade ◽  
Henrique Faneca ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Unsaturated Polyester ◽  
In Vitro Cytotoxicity ◽  
Cellular Viability ◽  
Water Contact ◽  
Polyester Resins ◽  
Unsaturated Polyesters ◽  
Unsaturated Polyester Resins ◽  
Acidic Nature

Abstract Additive Manufacturing (AM) technologies are an effective route to fabricate tailor made scaffolds for tissue engineering (TE) and regenerative medicine with microstereo-lithography (µSLA) being one of the most promising techniques to produce high quality 3D structures. Here, we report the crosslinking studies of fully biobased unsaturated polyesters (UPs) with 2-hydroxyethyl methacrylate (HEMA) as the unsaturated monomer (UM), using thermal and µSLA crosslinking processes. The resulting resins were fully characterized in terms of their thermal and mechanical properties. Determination of gel content, water contact angle (WCA), topography and morphology analysis by atomic force microscopy (AFM) and scanning electron microscopy (SEM) were also performed. The results show that the developed unsaturated polyester resins (UPRs) have promising properties for µSLA. In vitro cytotoxicity assays performed with 3T3-L1 cell lines showed that the untreated scaffolds exhibited a maximum cellular viability around 60 %, which was attributed to the acidic nature of the UPRs. The treatment of the UPRs and scaffolds with ethanol (EtOH) improved the cellular viability to 100%. The data presented in this manuscript contribute to improve the performance of biobased unsaturated polyesters in additive manufacturing.

scholarly journals Post-polymerisation modification of bio-derived unsaturated polyester resins via Michael additions of 1,3-dicarbonyls

2016 ◽  
Vol 7 (8) ◽  
pp. 1650-1658 ◽  
Author(s):  
T. J. Farmer ◽  
J. H. Clark ◽  
D. J. Macquarrie ◽  
J. K. Ogunjobi ◽  
R. L. Castle
Keyword(s):  
Michael Addition ◽  
Unsaturated Polyester ◽  
Polyester Resins ◽  
Unsaturated Polyesters ◽  
Unsaturated Polyester Resins ◽  
Michael Additions ◽  
First Time ◽  
The Michael Addition

A rapid (5 min), solventless and heterogeneously catalysed methodology is demonstrated for the first time for the Michael addition of 1,3-dicarbonyls to biomass derived unsaturated polyesters.

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