Optimization of nylon 6 reactors with end-point constraints

Estimation of polynomial distributed and leads with end point constraints

This paper wnsiders the use of the polynomial distributed lag (PDL) Cechnique when the lag length is estimated rather than tixed. We focus on the case where the degree of the polynomial is fixed_ the polynomial is mnstrained to be zero at a Certain lag length q. and q is estimated along with the other parameters. We extend the traditional PDL setup by allowing q to he real-valued rather than in...

Modification of Nylon 6 , 6 1

Nylon 6, 6 is regarded as tough and ductile materials since it exhibit high tensile elongation to break and high drop weight impact strengths. However, under conditions of stress concentration such as in the presence of sharp notches or cracks, polyamides exhibit brittle failure. This property, evaluated as notched Izod or Charpy impact tests, indicates that unmodified polyamides exhibit relati...

Drying kinetics of granular Nylon-6

In this study, the drying kinetics of granular nylon-6 has been investigated. Single particle drying experiments were carried out in a magnetic suspension balance (MSB) using dry air as drying agent. The comparison of measured and simulated data using Vrentas-Duda diffusion model shows a satisfactory prediction of mean particle moisture content and drying rates. The Flory-Huggins model predicts...

Fracture Toughness of Blends of Nylon 6 with Maleated Elastomers

Optimization with the time-dependent Navier-Stokes equations as constraints

In this paper, optimal distributed control of the time-dependent Navier-Stokes equations is considered. The control problem involves the minimization of a measure of the distance between the velocity field and a given target velocity field. A mixed numerical method involving a quasi-Newton algorithm, a novel calculation of the gradients and an inhomogeneous Navier-Stokes solver, to find the opt...