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Cover Picture: Macromol. React. Eng. 6/2014
Author(s) -
Oliveira Marco,
Barbosa Bernardo S.,
Nele Márcio,
Pinto José Carlos
Publication year - 2014
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201470020
Subject(s) - cover (algebra) , polymer chemistry , chain transfer , vinyl acetate , raft , suspension (topology) , polymerization , materials science , polymer science , morphology (biology) , radical polymerization , chemical engineering , chemistry , composite material , polymer , copolymer , geology , mathematics , mechanical engineering , paleontology , homotopy , pure mathematics , engineering
Cover: Different morphological aspects of poly(vinyl acetate) particles produced through suspension polymerization are shown. When produced by conventional free radical polymerization, final particles present an irregular oval morphological aspect, due to combination of the high shear rates and high reaction rates. When small amounts of the RAFT chain transfer agent are used, final particles present the usual spherical morphology of beads produced in suspension, due to the lower reaction rates and consequently longer relaxation times to dissipate shear tensions. Further details can be found in the article by M. Oliveira, B. S. Barbosa, M. Nele, and J. C. Pinto* on page 493 .