Zobrazeno 1 - 10
of 112
pro vyhledávání: '"Salvatore S. Stivala"'
Autor:
Zhenwen Zhou, Salvatore S. Stivala, Byoung Ho Choi, Alexander Chudnovsky, Kalyan Sehanobish, C. P. Bosnyak
Publikováno v:
International Journal of Solids and Structures. 42:681-695
The fracture initiation in engineering thermoplastics resulting from chemical degradation is usually observed in the form of a microcrack network within a surface layer of degraded polymer exposed to a combined action of mechanical stresses and chemi
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 41:1263-1272
Small-angle X-ray scattering (SAXS) was used to obtain solution parameters of a weak polyelectrolyte in water in the absence of any additives, such as neutralizing agents or salt. Poly(acrylic acid) (PAA) was used as a weak polyelectrolyte from which
Publikováno v:
Polymer. 37:715-719
Small-angle X-ray scattering (SAXS) has been applied in obtaining the solution parameters (molecular mass M, radius of gyration Rg, radius of gyration of cross-section Rq, mass per unit length Mu, and persistence length a ∗ ) of a poly(acrylic acid
Publikováno v:
Advances in Polymer Technology. 12:35-45
To establish the parameters for converting sheet molding compounds (SMCs) to useful products, various technical approaches, viz., solvent extraction, hydrolysis, and pyrolysis, have been explored. Thermogravimetric analysis of an SMC sample indicated
Publikováno v:
Carbohydrate Research. 101:1-11
A fractionated sample of S. salivarius levan was examined in aqueous solution at 25° by the method of small-angle X-ray scattering. The high molecular weight of 16.9 × 10 6 and low radius of gyration of 395 A suggest that this levan is branched. Th
Autor:
J. E. Zweig, Salvatore S. Stivala
Publikováno v:
Biopolymers. 20:605-619
The fractions obtained from the partially hydrolyzed branched Streptococcus salivarius levan were examined in solution. Sedimentation coefficients, S0, intrinsic viscosities, [η], weight-average molecular weights, Mw, and radii of gyration were obta
Publikováno v:
Journal of Applied Polymer Science. 19:2391-2402
Isotactic and atactic poly(4-methyl-1-pentene) powders were degraded in the presence of pure oxygen at temperatures of 145° and 175°C. The functional groups present in the nonvolatile products were identified using infrared spectroscopy. The volati
Publikováno v:
Thermochimica Acta. 90:189-193
Several procedures have been previously reported whereby non-isothermal TG (NITG) data can be analyzed for values of the activation energy ( E ) independent of values of the reaction order ( n ). In this paper, other expressions will be derived for t
Autor:
Leo Reich, Salvatore S. Stivala
Publikováno v:
Thermochimica Acta. 80:185-189
Publikováno v:
Thermochimica Acta. 116:367-371