The incorporation of the interfacial agents resulted in improvements in the mechanical properties of these TPVs, and the rubber particle size remained constant. The PP chain length and the functional groups present in the interfacial agents affected the magnitude of the improvement in the mechanical properties. The interfacial agents were primarily present on the

surface of the rubber particles in the blends, as shown by energy-dispersive X-ray spectra. These interfacial agents in the PP/rubber crumb blends led to a unique preyield kink in their stress-strain curves, a plateau, or a sharp turning point in the region of approximately 3% elongation and approximately 4-MPa stress. These kinks were interpreted similarly to the cold flow of semicrystalline polymers in tension. The addition of the interfacial modifiers AZD8931 decreased the shear viscosity and increased the entrance pressure drop in flow through capillary dies, and this was attributed to changes in the elongational viscosity of the blends. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 1051-1059, 2010″
“This article examines the effects of changing parameters in the test which was proposed by the FDA at the October

2005 Advisory Committee meeting for confirming delivered dose uniformity in selleck screening library orally inhaled and nasal drug products. This article is an extension of the characterization study presented in an accompanying article (Part 1). The goal of this study is to understand how parameters of the test affect the test performance. The effects of changing HM781-36B cost test parameters such as target interval, maximum allowable proportion in the tail area, and sample size are examined. The results show that changing the maximum allowable tail area and/or the target interval have the largest impact on the test outcomes, i.e., probability

of acceptance for a given batch mean and standard deviation. The presented information may provide potential users of the test with a set of tools for optimizing the test characteristics for a particular product.”
“In current work, the mechanical behavior of a Zr-based bulk metallic glass at elevated temperatures (from 423 to 683 K) under high strain rate (from 5000 to 10(4) s(-1)) is investigated by an improved split Hopkinson pressure bar apparatus. Experimental results reveal that the failure stress goes down along with elevated temperature, while the strain rate dependency is relatively small. Furthermore, three different fracture modes are observed along with elevated temperature by scanning electron microscope (SEM). SEM observation results also indicate that the fractured specimen has been crystallized at temperature near T(g) and the embrittlement caused by crystallization is attributed to the fracture mode changing. (C) 2010 American Institute of Physics. [doi:10.1063/1.