Premium
A model for microencapsulation in polyurea shell by means of interfacial polycondensation
Author(s) -
Sirdesai Mayur,
Khilar Kartic C.
Publication year - 1988
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450660326
Subject(s) - polyurea , condensation polymer , materials science , chemical engineering , shell (structure) , interfacial polymerization , diffusion , polymer chemistry , composite material , polymer , thermodynamics , polyurethane , engineering , physics , monomer
A quasi‐steady state model, based on two parallel modes of diffusion and a polycondensation reaction at the inside surface of a microcapsule, is formulated to compute the time of this microencapsulation process. The predicted times of encapsulation are in agreement with observed values reported in patents. It is also shown that, for small shell thickness, the process is reaction‐controlled.