Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Grace Chigwada"'
Autor:
Grace, Chigwada, Everson, Kandare, Dongyan, Wang, Stephen, Majoni, Darlington, Mlambo, Charles A, Wilkie, Jeanne M, Hossenlopp
Publikováno v:
Journal of Nanoscience and Nanotechnology. 8:1927-1936
Organically-modified montmorillonite (MMT) clays have been prepared using ammonium salts containing quinoline, pyridine, benzene, and styrenic groups. The nanocomposites were prepared by melt blending and the formation of nanocomposites was character
Publikováno v:
Polymer Degradation and Stability. 91:1781-1790
Composites of poly(vinyl ester) (PVE) with copper hydroxy dodecyl sulfate (CHDS) were prepared by thermal curing. The efficiency of the additive, CHDS, in reducing flammability is demonstrated via cone calorimetry and thermogravimetric analysis (TGA)
Publikováno v:
Polymer Degradation and Stability. 91:1209-1218
Potential fire retardants, including copper hydroxy dodecyl sulfate (CHDS), organically-modified montmorillonite (Cloisite 15A), and resorcinol di-phosphate (RDP), were added to pure poly(vinyl ester) (PVE) individually or in combinations at low conc
Publikováno v:
Polymer Degradation and Stability. 91:848-855
In this paper pyridine and quinoline-containing salts were employed to modify montmorillonite. TGA analysis shows that the quinolinium modified clay has a higher thermal stability than the pyridinium modified clay. Polystyrene nanocomposites were pre
Publikováno v:
Polymer Degradation and Stability. 91:755-762
Montmorillonite was organically modified using an ammonium salt containing 4-acetylbiphenyl. This clay (BPNC16 clay) was used to prepare polystyrene (PS), acrylonitrile butadiene styrene (ABS) and high impact polystyrene (HIPS) nanocomposites. Polyst
Publikováno v:
Thermochimica Acta. 436:113-121
New organically-modified clays containing a carbazole unit were prepared and the number of long alkyl chains on the surfactant was varied. The clay was used to prepare polystyrene nanocomposites by both bulk polymerization and melt blending. The disp
Publikováno v:
Polymer Degradation and Stability. 89:85-100
Vinyl ester (PVE) nanocomposites were prepared using both clay and polyhedral oligosilsesquioxanes (POSS) as the nano-dimensional material. From cone calorimetric data, it was shown that both POSS and clay affect the flammability of the nanocomposite
Synergy between nanocomposite formation and low levels of bromine on fire retardancy in polystyrenes
Publikováno v:
Polymer Degradation and Stability. 88:382-393
An organically-modified clay has been prepared using ammonium salts which contain an oligomeric material consisting of vinylbenzyl chloride, styrene and dibromostyrene. The presence of dibromostyrene enhances the flame retardancy of polystyrene nanoc
Autor:
Samson Sibanda, Jennifer M. Schmidt, William N. Setzer, Ephraim T. Gwebu, Angela I. Rea, Joseph A. Noletto, Grace Chigwada, Melvin Poole
Publikováno v:
Journal of Ethnopharmacology. 92:107-111
The leaf oil of Heteropyxis dehniae Suess. (Heteropyxidaceae) was obtained by hydrodistillation and analyzed by GC/MS. The most abundant essential oil components are linalool (58.3%), 4-terpineol (9.8%), α-terpineol (3.6%), and caryophyllene oxide (
Autor:
Grace Chigwada, Charles A. Wilkie
Publikováno v:
Polymer Degradation and Stability. 81:551-557
Polystyrene–clay nanocomposites combined with phosphorous-containing fire retardants have been prepared and used to explore the thermal stability and mechanical properties of the polymer formed. The amounts of fire retardants and clay used were var