Detail of "3052-61-7"

Reference

Living radical polymerization in homogeneous system by using iniferter: design of block copolymers

Living radical polymerization in homogeneous system by using iniferter: design of block copolymers. Otsu, T.; Kuriyama, A. (Fac. Eng., Osaka City Univ., Osaka 558, Japan). J. Macromol. Sci., Chem., A21(8-9), 961-77 (English) 1984. CODEN: JMCHBD. ISSN: 0022-233X. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Benzyl N-ethyldithiocarbamate (I) [28249-01-6] and p-xylylene bis(N-ethyldithiocarbamate) (II) [93522-33-9] were prepd., and used as mono- and bifunctional photoiniferters, resp., of the polymn. of styrene and Me methacrylate. These photopolymns. were performed via a living radical polymn. mechanism in a homogeneous system. The polymers obtained by I and II still contained 1 and 2 reactive N-ethyldithiocarbamate end groups, resp., bonded at their chain ends. When these polymers reacted with nucleophiles and Cu2+ the chain extension reactions occurring depended on their functionality. By using the polymers obtained by I and II as mono- and bifunctional polymeric photoiniferters, AB and ABA block copolymers were also obtained, resp. Similar results were obtained by using benzyl N,N-diethyldithiocarbamate [3052-61-7] and p-xylylene bis(N,N-diethyldithiocarbamate) [89964-93-2] as mono- and bifunctional photoiniferters, resp. These results were also compared and discussed.

Polymer design by iniferter technique in radical polymerization: synthesis of AB and ABA block copolymers containing random and alternating copolymer sequences

Polymer design by iniferter technique in radical polymerization: synthesis of AB and ABA block copolymers containing random and alternating copolymer sequences. Otsu, Takayuki; Kuriyama, Akira (Fac. Eng., Osaka City Univ., Osaka 558, Japan). Polym. J. (Tokyo), 17(1), 97-104 (English) 1985. CODEN: POLJB8. ISSN: 0032-3896. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) The iniferter (initiator-transfer agent-terminator) technique was applied to the synthesis of the AB and ABA block copolymers contg. various random and alternating copolymer sequences. Monomeric photoiniferters used were of general formula Ar[CH2SC(:S)NEt2]x [Ar = Ph, x = 1, (I) [3052-61-7]; Ar = 1,4-C6H4, x = 2, (II) [89964-93-2]; and Ar = 1,2,4,5-C6H2, x = 4, (III) [92687-20-2]]. Polymeric photoiniferters were prepd. by photolysis of I, II, and III. The photopolymns. with I and II proceeded via a living radical mechanism III and gave sol. mono- and bifunctional polymers, resp. However, III induced living radical polymn. of styrene with gelation. When various polymers and copolymers obtained by I and II were used as polymeric photoiniferters, the AB and ABA block copolymers contg. random copolymer sequences were obtained in high yields. Similarly, the alternating copolymn. of iso-Bu vinyl ether with maleic anhydride in the presence of alternating copolymers (e.g., styrene and di-iso-Pr fumarate), which were obtained with I and II, as polymeric photoiniferters gave the AB and ABA block copolymers consisting of alternating copolymer sequences. III and the polymers and copolymers obtained by III could also act as an excellent crosslinking agent.