Simulation of tubular low‐density polyethylene
作者:
Santosh K. Gupta,
Anil Kumar,
M. V. G. Krishnamurthy,
期刊:
Polymer Engineering&Science
(WILEY Available online 1985)
卷期:
Volume 25,
issue 1
页码: 37-47
ISSN:0032-3888
年代: 1985
DOI:10.1002/pen.760250108
出版商: Society of Plastics Engineers, Inc.
数据来源: WILEY
摘要:
AbstractThe simulation of tubular, high‐pressure low‐density polyethylene reactors is performed using a comprehensive kinetic scheme which includes branching reactions as well as reactions leading to vinyl and vinylidene group formation. The variation of the physical properties of the reaction mass with position has been accounted for. In addition to predicting the conversions of the monomer and initiator, the temperature, and the number‐average molecular weight, this study enables the computation of the polydispersity index and the concentration of vinyl, vinylidene, and methyl groups as a function of position. These have important implications in terms of product properties. Detailed simulations have shown that the steady‐state approximation can be used for obtaining the concentrations of the initiator and the polymer radicals. In addition, some simple closure conditions have been established. The effect of multiple intermediate feeds is also investigated and it is found that under certain operating conditions the reactor performance becomes inherently u
点击下载:
PDF
(871KB)
返 回