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Starch urea formaldehyde matrix encapsulation of solid agrochemicals. I. Matrix synthesis and characterizations
Author(s) -
Rajagopalan N.,
Shukla P. G.,
Bhaskar C.,
Banker V. S.,
Dharia J. R.,
Khilar Kartic C.
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070450518
Subject(s) - starch , urea , formaldehyde , chemical engineering , matrix (chemical analysis) , urea formaldehyde , materials science , polymer chemistry , nuclear chemistry , chemistry , organic chemistry , composite material , adhesive , layer (electronics) , engineering
A starch urea formaldehyde (starch‐UF) matrix has been studied for application to the encapsulation of a solid insecticide. The pertinent parameters relating to the matrix synthesis have been identified and the influences of these parameters on release of the insecticide from the starch UF matrix have been investigated. The key parameter controlling the rate of release is the urea to starch ratio. It is shown that the release process can be described in terms of the generalized equation M t / M ∞ = kt n where k and n vary with system variables.