TY - JOUR
T1 - Synthesis of liquid crystalline-amorphous block copolymers by the combination of atom transfer and photoinduced radical polymerization mechanisms
AU - Serhatli, I. E.
AU - Kacar, T.
AU - Önen, A.
PY - 2003/7/1
Y1 - 2003/7/1
N2 - The synthesis of ABA-type block copolymers, involving liquid-crystalline 6-(4-cyanobiphenyl-4′-oxy)hexyl acrylate (LC6) and styrene (St) monomer with copper-based atom transfer radical polymerization (ATRP) and photoinduced radical polymerization (PIRP), was studied. First, photoactive α-methylol benzoin methyl ether was esterified with 2-bromopropionyl bromide, and it was subsequently used for ATRP of LC6 in diphenylether in conjunction with CuBr/N,N,N′,N″,N″-pentamethyldiethylenetriamine as a catalyst. The obtained photoactive functional liquid-crystalline polymer, poly[6-(4-cyanobiphenyl-4prime;-oxy)hexyl acrylate] (PLC6), was used as an initiator in PIRP of St. Similarly, photoactive polystyrenes were also synthesized and employed for the block copolymerization of LC6 in the second stage. The spectral, thermal, and optical measurements confirmed a full combination of ATRP and PIRP, which resulted in the formation of ABA-type block copolymers with very narrow polydispersities.
AB - The synthesis of ABA-type block copolymers, involving liquid-crystalline 6-(4-cyanobiphenyl-4′-oxy)hexyl acrylate (LC6) and styrene (St) monomer with copper-based atom transfer radical polymerization (ATRP) and photoinduced radical polymerization (PIRP), was studied. First, photoactive α-methylol benzoin methyl ether was esterified with 2-bromopropionyl bromide, and it was subsequently used for ATRP of LC6 in diphenylether in conjunction with CuBr/N,N,N′,N″,N″-pentamethyldiethylenetriamine as a catalyst. The obtained photoactive functional liquid-crystalline polymer, poly[6-(4-cyanobiphenyl-4prime;-oxy)hexyl acrylate] (PLC6), was used as an initiator in PIRP of St. Similarly, photoactive polystyrenes were also synthesized and employed for the block copolymerization of LC6 in the second stage. The spectral, thermal, and optical measurements confirmed a full combination of ATRP and PIRP, which resulted in the formation of ABA-type block copolymers with very narrow polydispersities.
KW - Amorphous
KW - Atom transfer radical polymerization (ATRP)
KW - Block copolymers
KW - Liquid crystal
KW - Photoinduced radical polymerization
UR - http://www.scopus.com/inward/record.url?scp=0037742611&partnerID=8YFLogxK
U2 - 10.1002/pola.10732
DO - 10.1002/pola.10732
M3 - Article
AN - SCOPUS:0037742611
SN - 0887-624X
VL - 41
SP - 1892
EP - 1903
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
IS - 13
ER -