TY - JOUR
T1 - Block copolymer synthesis and chain extension from TEMPO-terminated chains formed by ultrasonic chain scission
AU - Çcatalgil-Giz, Huceste
AU - Hepuzer, Yesim
PY - 2000/8
Y1 - 2000/8
N2 - Long poly(ethyl methacrylate) (Mn = 2,300,000) and polystyrene (Mn = 1,200,000) chains were subjected to ultrasonic scission in the presence of a radical scavenger, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO). This procedure yielded polymers with lower molecular weights and TEMPO terminal units. Application of these polymers in stable radical mediated polymerization of styrene resulted in chain extension and block copolymers, depending on the precursor polymer. Block copolymer formation was evidenced by NMR measurement, and chain extension was shown by GPC analysis.
AB - Long poly(ethyl methacrylate) (Mn = 2,300,000) and polystyrene (Mn = 1,200,000) chains were subjected to ultrasonic scission in the presence of a radical scavenger, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO). This procedure yielded polymers with lower molecular weights and TEMPO terminal units. Application of these polymers in stable radical mediated polymerization of styrene resulted in chain extension and block copolymers, depending on the precursor polymer. Block copolymer formation was evidenced by NMR measurement, and chain extension was shown by GPC analysis.
UR - http://www.scopus.com/inward/record.url?scp=0034247274&partnerID=8YFLogxK
U2 - 10.1002/1097-4628(20000829)77:9<1950::AID-APP10>3.0.CO;2-J
DO - 10.1002/1097-4628(20000829)77:9<1950::AID-APP10>3.0.CO;2-J
M3 - Article
AN - SCOPUS:0034247274
SN - 0021-8995
VL - 77
SP - 1950
EP - 1953
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
IS - 9
ER -