Efficient and rapid synthesis of polyureas and polythioureas from the reaction of urea and thiourea with diamines under microwave irradiation

Banihashemi, Ahmad; Hazarkhani, Hassan; Abdolmaleki, Amir

doi:10.1002/pola.20060

Cited by 52 publications

(36 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 3D structure of these three polymers was determined using two complementary approaches: (1) a version of the Universal Structure Predictor: Evolutionary Xtallography (USPEX) method [33][34][35][36][37] specially modified to handle repeat units rather than atoms as the building blocks, and (2) a classical 57 Polyether, polyketone CH 2 -C 6 H 6 -CO-O Polyester CH 2 -NH-CO-NH 56 Polyurea CH 2 -NH-CS-NH 56 Polythiourea CH 2 -C 6 H 4 -CH 2 …”

Section: Resultsmentioning

confidence: 99%

Rational design of all organic polymer dielectrics

et al. 2014

View full text Add to dashboard Cite

To date, trial and error strategies guided by intuition have dominated the identification of materials suitable for a specific application. We are entering a data-rich, modelling-driven era where such Edisonian approaches are gradually being replaced by rational strategies, which couple predictions from advanced computational screening with targeted experimental synthesis and validation. Here, consistent with this emerging paradigm, we propose a strategy of hierarchical modelling with successive downselection stages to accelerate the identification of polymer dielectrics that have the potential to surpass 'standard' materials for a given application. Successful synthesis and testing of some of the most promising identified polymers and the measured attractive dielectric properties (which are in quantitative agreement with predictions) strongly supports the proposed approach to material selection.

show abstract

Section: Resultsmentioning

confidence: 99%

Rational design of all organic polymer dielectrics

et al. 2014

View full text Add to dashboard Cite

show abstract

“…12 Here, we report on a novel method for the synthesis of polyhydrazides and polythiohydrazides from aromatic and aliphatic dihydrazides with urea or thioureas under microwave irradiation. To the best of our knowledge, this report is the first of its kind on polymers.…”

Section: -11mentioning

confidence: 99%

A novel method for the synthesis of polyhydrazide and polythiohydrazide from urea and thiourea

Abdolmaleki

2011

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

A novel technique based on microwave irradiation was developed to synthesize polyhydrazide and polythiohydrazide. These polymers were readily synthesized by the reaction of aromatic and aliphatic dihydrazides with urea and thiourea. The effects of microwave irradiation time, power, solvent nature, and solid content of monomers on the inherent viscosity of the polymers were investigated. The polymers were characterized by 1 H-NMR and IR spectroscopy and elemental analysis.

show abstract

“…The synthesis of high-molecular-weight polyureas and polythioureas via the reaction of aromatic and aliphatic amines with urea and thioureas in the presence of a catalytic amount of p-toluenesulphonic acid was reported by Banihashemi et al [127] using 400 W microwave irradiations for 12 min in different solvents. Out of all the solvents used, N, Ndimethyl-acetamide was found as the most appropriate solvent owing to the greater solubility of the substrates, the higher rate of the reactions, and the excellent energy-transfer properties.…”

Section: Synthesis Of Poly(urea)s and Poly(urethane)smentioning

confidence: 99%