Release rate characteristics of microencapsulated 2,3,5,6‐tetrachloro‐4‐methylsulfonylpyridine | Zendy

Noren G. K. | Zendy; Korpi G. K. | Zendy; England G. J. | Zendy

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Release rate characteristics of microencapsulated 2,3,5,6‐tetrachloro‐4‐methylsulfonylpyridine

Author(s) -

Noren G. K.,

Korpi G. K.,

England G. J.

Publication year - 1979

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.1979.070241205

Subject(s) - extraction (chemistry) , urea formaldehyde , in situ polymerization , polymerization , formaldehyde , methanol , solubility , aqueous medium , aqueous solution , chemical engineering , chemistry , materials science , porosity , nuclear chemistry , polymer chemistry , chromatography , polymer , organic chemistry , adhesive , layer (electronics) , engineering

The rate at which 2,3,5,6‐tetrachloro‐4‐methylsulfonylpyridine (TMP) is released from a microcapsular controlled delivery device was determined using aqueous methanol as an extraction medium. The microcapsules were prepared by in situ polymerization of a urea–formaldehyde resin. Release rate studies demonstrated that the amount of 2,3,5,6‐tetrachloro‐4‐methylsulfonylpyridine released is proportional to t −1/2 and the solubility of 2,3,5,6‐tetrachloro‐4‐methylsulfonylpyridine in the extraction medium. These relationships are characteristic of a porous, monolithic delivery system.

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