VISCOSITY IMPROVERS FOR COPOLYMER POLYETHYLENE - POLYPROPYLENE SOLUTIONS
Journal Title: Journal of Science And Arts - Year 2013, Vol 23, Issue 2
Abstract
In this article we presented viscosity indices for poly (ethylene-copropylene) copolymer solutions in rapeseed oil using three methods. Viscosity indices are calculated from the measured viscosity at 40 and 100 ºC according to ASTM D 2270, using program VI and graphical method from ASTM D 341. The viscosity-temperature coefficients for poly (ethylene-co-propylene) copolymer solutions in rapeseed oil were calculated from the measured viscosity at 40 and 100 ºC
Authors and Affiliations
IOANA STANCIU
LICHENS AS BIOMONITORS OF HEAVY METAL AIR POLLUTION <br /> IN THE TARGOVISTE AREA<br />
In this work we have been used the advantages of EDXRF method to identify the presence of heavy metals (Cu, Fe, Pb and Zn) in the air of Targoviste town and its surroundings. The measurements were performed in the labora...
ON THE SPEED OF CONVERGENCE OF THE SEQUENCES
The study of any nontrivial convergence of a sequence of real numbers conducts to the problem of finding the limit but also to the problem of the speed of this convergence. This speed of convergence is characterized by t...
CONSTRUCTIVE SOLUTION OF PROBLEMS IN MECHANICS OF CONTINUA
It is well known the importance of the effective solution, both analytically or numerically, of problems in mechanics. In this work we extend the multiple orthogonal sequence method to the energetic space of an abstract...
LIE-ALGEBRA AND MODIFIED JACOBI POLYNOMIALS
In the present paper, L. Weisner’s group-theoretic method has been utilized in obtaining generating functions of , a modification of the Jacobi polynomials - In section 1, with the suitable simultaneous interpretations...
ON A PROPERTY OF THE SPLINE FUNCTIONS
The definition of the spline functions as solutions of a variational problem is presented in the preliminaries of this paper and are shown some theorems regarding to the existence and uniqueness. The main result of this...