On January 31, 2022, Bardakova, Kseniia N.; Kholkhoev, Bato Ch.; Farion, Ivan A.; Epifanov, Evgenii O.; Korkunova, Olga S.; Efremov, Yuri M.; Minaev, Nikita V.; Solovieva, Anna B.; Timashev, Peter S.; Burdukovskii, Vitaliy F. published an article.Name: 1,3-Diphenylurea The title of the article was 4D Printing of Shape-Memory Semi-Interpenetrating Polymer Networks Based On Aromatic Heterochain Polymers. And the article contained the following:
Most of the presently known thermosensitive shape-memory polymers suitable for 4D printing have insufficient mech. strength and thermal stability that restricts their potential areas of application. Here, new photosensitive compositions (PSCs) based on aromatic heterochain polymers – poly-N,N’-(m-phenylene)isophthalamide (MPA) or poly-2,2′-(p-oxydiphenylene)-5,5′-dibenzimidazole (OPBI) – for DLP printing are proposed. Thermal post-curing and supercritical carbon dioxide (scCO2) are used for post-processing of the structures. During the scCO2 treatment the removal of unreacted monomeric component (N,N-dimethylacrylamide) and its uncrosslinked oligomers is accompanied by the preservation of the initial degree of crosslinking. The more stable shrinkage is observed for the combined post-processing method (T°+scCO2) in the case of OPBI-PSC and after the heat treatment for MPA-PSC specimens. The method of post-processing and the nature of the heterochain polymer strongly affect the mech. properties and thermal resistance of the structures. The tensile strength has the maximum value after the thermal post-treatment (101.1 ± 7.1 and 78.4 ± 5.1 MPa of OPBI-PSC and MPA-PSC, resp.). The intense destruction of the materials is observed at 393 and 408°C for MPA-PSC and OPBI-PSC, resp. Moreover, the 4D-printed structures exhibit excellent shape memory performance at transition temperatures >100°C, thus have a great potential for the use in aerospace, robotics, sensorics. The experimental process involved the reaction of 1,3-Diphenylurea(cas: 102-07-8).Name: 1,3-Diphenylurea
The Article related to polybenzimidazole semi interpenetrating polymer network shape memory property, Plastics Fabrication and Uses: Plastic Product Uses and other aspects.Name: 1,3-Diphenylurea
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics