Organocatalysis in ring opening copolymerization as a means of tailoring molecular weight dispersity and the subsequent impact on physical properties in 4D printable photopolymers

Abstract

Vat photopolymerization 3D printing has traditionally relied on free radical crosslinking between alkenes to produce non-degradable parts, which may have limited use in the biomedical and clinical spaces. Photopolymer resins...

Advanced Biomaterials for 3D Printing via a Synergistic Dual-Photopolymer Design

“…To tackle this issue, different strategies have been attempted to develop mechanically advanced degradable biomaterials for vat photopolymerization, such as the synthesis of star photopolymers, , the introduction of extra linkages, , side group engineering, the preparation of block photopolymers, , stereochemistry control and thiol–ene chemistry, − and dispersity control . Most recently, a dual-photopolymer formulation approach has emerged as a straightforward strategy for 3D-printing tough and elastic biomaterials. ,− Based on the combination of a longer polymer and a shorter polymer, robust bimodal networks can be formed, benefiting from high chain flexibility from the former and high cross-linking ability from the latter (Figure ).…”

Network Polymer Properties Engineered Through Polymer Backbone Dispersity and Structure

“…Needless to say, the importance of MWD on mechanical properties cannot be overemphasized. [47][48][49] Recently, Weems and co-workers [50] developed a ring-opening polymerization approach to control primary backbone dispersity, with subsequent functionalization to create cross-linkable monomers. Although demonstrating changes in mechanical properties with different backbone dispersity, the materials synthesized also had substantial differences in number averaged molecular weight coupled with the changes in dispersity, making separation of the chain length and dispersity effects challenging.…”

Ring Opening Copolymerization of Epoxides with CO2 and Organic Anhydrides Promoted by Dinuclear [OSSO]‐type Metal Complexes

“…Among the synthetic tools to build new polymeric architectures, ring opening copolymerization (ROCOP) of epoxides with cyclic anhydrides or CO 2 offers the advantage of tailoring [1][2][3] the properties of the resulting polymer by the rational choice of the molecular structure of the starting monomers by combining epoxides and cyclic anhydrides or CO 2 . [4][5][6] In addition, the resulting copolymers (bearing esters and carbonate functionalities) possess, in principle, cleavable bonds with the possibility of obtaining hydrolyzable polymeric materials.…”