Citation: HAN Xiaozu, ZHANG Bolan, ZHANG Zhaomou, ZHANG Xitian, LIU Shuhai. SYNTHESIS AND CHARACTERIZATION OF BLOCK POLYMER OF ALTERNATING COPOLYMERS[J]. Chinese Journal of Polymer Science, ;1986, 4(4): 303-308. shu

SYNTHESIS AND CHARACTERIZATION OF BLOCK POLYMER OF ALTERNATING COPOLYMERS

Received Date: 25 December 1984

Block polymer of alternating copolymers, poly[(ST-a-MA)-b(IP-a-MMA)-b-(ST-a-MA)](I), has been synthesized in the presence of AlEt1.5Cl1.5,by using Mn2(CO)10/CBr4. initiation system.The GPC results indicate that there is no unreacted prepolymer in I purified by precipitation andfractionation. The study of NMR shows that every block of polymer I has alternating structure. The dynamicmechanical properties of I measured by torsional braid method indicate that the polymer has two Tg s,being 38 and 75℃,respectively.The transmission electron micrographs of I show they have two phase structure and the domain size increases with increasing molecular weight of hard block.
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