Novel flame retardant poly(thiourea-sulfone-imide)s for high temperature applications: synthesis and characterization

Ghulam WARIS; Humaira Masood SIDDIQI; Lance James TWYMAN

Makale detayları

Novel flame retardant poly(thiourea-sulfone-imide)s for high temperature applications: synthesis and characterization

Yazarlar:

Ghulam WARIS | Humaira Masood SIDDIQI | Lance James TWYMAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2013 Vol.37 Issue 6, pp.946-958

Belge Tipi:

Makale

Yayın Tarihi:

5/2013

Belge Dili:

Türkçe

Document ID (Org No.):

2000727297

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

The synthesis and polymerization of a novel diamine  monomer, 1,1-(sulfonylbis (4,1-phenylene)) bis (thiourea) (SPT), with various  aromatic dianhydrides were carried out. In addition, the fabrication of  poly(thiourea-sulfone-imide)s (PTSIs) with noble thermal properties and  flame retardancy was conducted. The structures of SPT and polymers were  characterized by FT-IR, 1H NMR, and 13C NMR spectroscopy along  with elemental analysis. Crystallinity, organosolubility, inherent  viscosity, and gel permeation chromatographic measurements were taken as  well. The amorphous nature was exhibited by PTSIs containing C=S and  --SO2- moieties in the backbone that were readily soluble in highly  polar organic solvents. The inherent viscosities of PTSIs were 0.89--1.13 dL  g-1 and molecular weights were 87,000--96,550 g mol-1,  respectively. Their thermal stability was studied in terms of temperature at  10% weight loss, which ranged between 478 and 526 °C under inert  atmosphere. Polyimides had a glass transition temperature around 253--268  °C depending on the dianhydrides used. The flame retardant  properties of PTSIs were studied in terms of limiting oxygen index values  and were measured in the range of 50--56.

 

The synthesis and polymerization of a novel diamine  monomer, 1,1-(sulfonylbis (4,1-phenylene)) bis (thiourea) (SPT), with various  aromatic dianhydrides were carried out. In addition, the fabrication of  poly(thiourea-sulfone-imide)s (PTSIs) with noble thermal properties and  flame retardancy was conducted. The structures of SPT and polymers were  characterized by FT-IR, 1H NMR, and 13C NMR spectroscopy along  with elemental analysis. Crystallinity, organosolubility, inherent  viscosity, and gel permeation chromatographic measurements were taken as  well. The amorphous nature was exhibited by PTSIs containing C=S and  --SO2- moieties in the backbone that were readily soluble in highly  polar organic solvents. The inherent viscosities of PTSIs were 0.89--1.13 dL  g-1 and molecular weights were 87,000--96,550 g mol-1,  respectively. Their thermal stability was studied in terms of temperature at  10% weight loss, which ranged between 478 and 526 °C under inert  atmosphere. Polyimides had a glass transition temperature around 253--268  °C depending on the dianhydrides used. The flame retardant  properties of PTSIs were studied in terms of limiting oxygen index values  and were measured in the range of 50--56.

Makale detayları

Novel flame retardant poly(thiourea-sulfone-imide)s for high temperature applications: synthesis and characterization

Yazarlar: Ghulam WARIS | Humaira Masood SIDDIQI | Lance James TWYMAN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2013 Vol.37 Issue 6, pp.946-958

Belge Tipi: Makale

Yayın Tarihi: 5/2013

Belge Dili: Türkçe

Document ID (Org No.): 2000727297

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Ghulam WARIS | Humaira Masood SIDDIQI | Lance James TWYMAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2013 Vol.37 Issue 6, pp.946-958

Belge Tipi:

Makale

Yayın Tarihi:

5/2013

Belge Dili:

Türkçe

Document ID (Org No.):

2000727297

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527