CAJ | 학술논문

以S-十二烷基-S’-（α，α’-二甲基-α’’-乙酸）-三硫代碳酸酯（ DDMAT）为链转移剂，通过可逆加成-断裂链转移自由基聚合（ RAFT）方法制备了窄分布的聚2-乙烯基吡啶。再以该聚合物为大分子链转移剂，引发苯乙烯的RAFT聚合，得到聚2-乙烯基吡啶-b-聚苯乙烯（ P2VP-b-PS）的两嵌段共聚物。以P2VP-b-PS为RAFT试剂，合成聚2-乙烯基吡啶-b-聚苯乙烯-b-聚异戊二烯（ P2VP-b-PS-b-PI）的三嵌段共聚物。运用1 H NMR、IR 和凝胶渗透色谱（ GPC）等技术对产物的结构和分子量及分子量分布进行表征，采用原子力显微镜（ AFM）观察三嵌段共聚物薄膜的微相分离结构。结果表明，所得三嵌段共聚物P2VP72-b-PS136-b-PI300分子量分布较窄（PDI=1.69），合成过程具有活性/可控聚合特征，聚合物薄膜经溶剂退火处理后出现了明显的微观相分离结构。
이S-십이완기-S’-（α，α’-이갑기-α’’-을산）-삼류대탄산지（ DDMAT）위련전이제，통과가역가성-단렬련전이자유기취합（ RAFT）방법제비료착분포적취2-을희기필정。재이해취합물위대분자련전이제，인발분을희적RAFT취합，득도취2-을희기필정-b-취분을희（ P2VP-b-PS）적량감단공취물。이P2VP-b-PS위RAFT시제，합성취2-을희기필정-b-취분을희-b-취이무이희（ P2VP-b-PS-b-PI）적삼감단공취물。운용1 H NMR、IR 화응효삼투색보（ GPC）등기술대산물적결구화분자량급분자량분포진행표정，채용원자력현미경（ AFM）관찰삼감단공취물박막적미상분리결구。결과표명，소득삼감단공취물P2VP72-b-PS136-b-PI300분자량분포교착（PDI=1.69），합성과정구유활성/가공취합특정，취합물박막경용제퇴화처리후출현료명현적미관상분리결구。
Macro-RAFT agent,poly(2-vinyl pyridine)were synthesized by reversible addition-fragmenta-tion chain transfer( RAFT)polymerization using S-dodecyl-S’-(α,α’-dimethyl-α’’-acetic acid)-tri-thiocarbonate as the chain transfer agent. Poly(2-vinyl pyridine)-b-poly( styrene)( P2VP-b-PS)diblock copolymers were synthesized using styrene as monomer and the macro-RAFT agent as the chain transfer a-gent. Then,poly(2-vinyl pyridine)-b-poly(styrene)-b-poly(isoprene)(P2VP-b-PS-b-PI)triblock copol-ymers were synthesized using isoprene as monomer and the P2VP-b-PS as the chain transfer agent. The molecular structure and molecular weight of the products were characterized by 1 H NMR,IR and GPC. The results indicate that RAFT is a successful access to the triblock copolymer P2 VP76-b-PS160-b-PI300 with narrow molecular weight distribution(PDI=1. 69). The film from P2VP72-b-PS136-b-PI300,character-ized by AFM,has an obvious microphase structure after solvent annealing.