MICROWAVE-INDUCED AND HIGH TEMPERATURE SOLUTION POLYMERIZATION OF 4-(4'-T-BUTYLPHENYL)-1,2,4-TRIAZOLIDINE-3,5-DIONE WITH DIISOCYANATES

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MALAKPOUR SH.; REZAZADEH S.

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Journal: Iranian Polymer Journal Year:2004 | Volume:13 | Issue:1 Page(s): 29-38

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Title

MICROWAVE-INDUCED AND HIGH TEMPERATURE SOLUTION POLYMERIZATION OF 4-(4'-T-BUTYLPHENYL)-1,2,4-TRIAZOLIDINE-3,5-DIONE WITH DIISOCYANATES

Author(s)

MALAKPOUR SH. | REZAZADEH S. | Issue Writer Certificate

Keywords

4-(4 -TERT-BUTYLPHENYL)URAZOLEQ4

POLYUREAS; INHERENT VISCOSITYQ4

STEP-GROWTH POLYMERIZATIONQ4

THERMAL PROPERTIESQ4

THERMOGRAVIMETRIC ANALYSIS (TGA)Q4

MICROWAVEQ4

Abstract

4-(4¢-tert-Butylphenyl)-1,2,4-triazolidine-3,5-dione, 4-(4¢-tert-butylphenyl)urazole (TBPTD) was prepared from 4-tert-butylbenzoic acid in 5 steps. TBPTD was reacted with n-propylisocyanate in dry N,N-dimethylformamide and the resulting bisurea derivative was obtained in high yield and was finally used as a model for polymerization reaction. The STEP-GROWTH POLYMERIZATION reactions of monomer TBPTD with hexamethylene diioscyanate, isophorone diioscyanate and toluene-2,4-diioscyanate were performed in N,N-dimethylacetamide solution in the presence of pyridine, triethylamine or dibutyltin dilurate as a catalyst. The step-growth reactions were performed under MICROWAVE irradiation as well as high temperature solution polymerization. The polycondensation proceeded rapidly, compared with the conventional solution polycondensation and was almost completed within 10-18 min. The resulting novel polyureas have an inherent viscosity (hinh) in a range of 0.025-0.306 dL/g in DMF or sulphuric acid at 25°C. These new polyureas were characterized by IR, 1H NMR, elemental analysis and TGA. Some physical properties and structural characterization of these novel polyureas are reported.

Cites

APPLICATION OF MICROWAVE-ASSISTED REACTIONS IN STEP-GROWTH POLYMERIZATION: A REVIEW

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APA: Copy

MALAKPOUR, SH., & REZAZADEH, S.. (2004). MICROWAVE-INDUCED AND HIGH TEMPERATURE SOLUTION POLYMERIZATION OF 4-(4'-T-BUTYLPHENYL)-1,2,4-TRIAZOLIDINE-3,5-DIONE WITH DIISOCYANATES . IRANIAN POLYMER JOURNAL (ENGLISH), 13(1), 29-38. SID. https://sid.ir/paper/85889/en

Vancouver: Copy

MALAKPOUR SH., REZAZADEH S.. MICROWAVE-INDUCED AND HIGH TEMPERATURE SOLUTION POLYMERIZATION OF 4-(4'-T-BUTYLPHENYL)-1,2,4-TRIAZOLIDINE-3,5-DIONE WITH DIISOCYANATES . IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2004;13(1):29-38. Available from: https://sid.ir/paper/85889/en

IEEE: Copy

SH. MALAKPOUR, and S. REZAZADEH, “MICROWAVE-INDUCED AND HIGH TEMPERATURE SOLUTION POLYMERIZATION OF 4-(4'-T-BUTYLPHENYL)-1,2,4-TRIAZOLIDINE-3,5-DIONE WITH DIISOCYANATES ,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 13, no. 1, pp. 29–38, 2004, [Online]. Available: https://sid.ir/paper/85889/en

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