NOPR Collection:

The closed-form solutions for a nonsimilar viscoelastic boundary layer flow and heat transfer

Thu, 01 Oct 1998 00:00:00 GMT

Title: The closed-form solutions for a nonsimilar viscoelastic boundary layer flow and heat transfer Authors: Nataraja, H R; Sarma, M S; Rao, B Nageswara Abstract: The nonsimilar boundary layer equations for the flow of an incompressible second-order fluid over a stretching sheet are solved analytically to obtain the coefficients of skin-friction and heat transfer. Page(s): 339-342

Sulfonation of arylamine Part-5 : Preparation and thermal decomposition of di-m-chloroanilinium sulfate

Thu, 01 Oct 1998 00:00:00 GMT

Title: Sulfonation of arylamine Part-5 : Preparation and thermal decomposition of di-m-chloroanilinium sulfate Authors: Singh, Gurdip; Kapoor, Inder Pal Singh; Singh, Jyotsna Abstract: White crystalline solid of di-m-chloroanilinium sulfate (di-m-CIAS) was obtained when m-chloroaniline and cone sulfuric acid were mixed together in the ratio of 1:1 or 2: 1 at room temperature. Thermal decomposition of di-m-C1AS gave two isomeric chloro aminobenzene sulfonic acids (sulfonated products) and kinetics for the same was evaluated using both isothermal and non-isothermal TG data. Di-m-C1AS seems to decompose by N-H bond heterolysis prior to sulfonation. Page(s): 334-338

Tribological performance of fibre reinforced poly-ether-ether-ketone

Thu, 01 Oct 1998 00:00:00 GMT

Title: Tribological performance of fibre reinforced poly-ether-ether-ketone Authors: Harsha, A P; Prakash, Braham; Tewari, U S Abstract: The tribological performance of carbon and glass fibre reinforced poly-ether-ether-ketone (PEEK) for parallel (P) and normal orientation (N) has been conducted on pin-on-disc machine under dry sliding conditions. The influence of variables such as sliding distance, load, velocity, abrasive grit size has been investigated. It was observed that fibre orientation has a significant influence on tribological performance of the polymer composites. An increased friction and wear Was observed for parallel fibre orientation than normal fibre orientation. The dependence of the wear rate on the fibre orientation is difficult to model in a quantitative manner. Page(s): 329-333

High stress wear studies on addition of polycarbonate in red mud filled isotactic polypropylene

Thu, 01 Oct 1998 00:00:00 GMT

Title: High stress wear studies on addition of polycarbonate in red mud filled isotactic polypropylene Authors: Chand, Navin; Hashmi, S A R Abstract: Effect of addition of polycarbonate (PC) on abrasive wear resistance of red mud (RM) filled polypropylene (PP) composites has been studied. Different volume fractions of PC have been incorporated in RM filled PP. Structural changes of samples were studied by using X-ray diffraction technique. Characteristic intensity peaks of PP have been reduced on addition of polycarbonate. Wear losses at different loads have been evaluated for various blend compositions. Wear loss increased with the increase of PC contents in PPIPCIRM composites up to 30 wt%, thereafter wear loss decreased due to morphological changes in composites. Effect of load variation and sliding distance on wear characteristics of blend composites have been measured and discussed based on the observations of worn surfaces. Page(s): 324-328