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Citation: Fang Tianru, Xu Suxian, Yu Li, Liu Zhaoyan. WATER-SOLUBLE AND AMPHIPLIC POLYMERS Ⅰ.SYNTHESIS AND CHARACTERIZATION OF PEO-PSt-PEO TRIBLOCK POLYMERS[J]. Chinese Journal of Applied Chemistry, ;2016, 4(5): 35-39. shu

WATER-SOLUBLE AND AMPHIPLIC POLYMERS Ⅰ.SYNTHESIS AND CHARACTERIZATION OF PEO-PSt-PEO TRIBLOCK POLYMERS

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Corresponding author: Fang Tianru,
Received Date: 27 March 1986
Available Online: 11 October 1986

Ethylene oxide-styrene-ethylene oxide triblock polymers (PEO-PSt-PEO)were synthesized via sequential anionic polymerization by using sodium naphthalene as initiator, and the purified PEO-PSt-PEO triblock polymers and their parent polystyrenes were characterized by viscometry, GPC, ¹H-NMR, dn/dc, and solubility measurements. It was found that the intrinsic viscosity and molecular weight of polystyrene inversely increased with the decrease of[M]/[I] ratio in the case of high concentration of initiator, indicating the existence of self-inhibiting action of inifiator. The refractive index increments of PEO-PSt-PEO triblock polymers showed good linear relations with their compositions. Therefore, dn/dc measurements can be used as a reliable method for the composition determination of the block polymers studied. Peak molecular weights of the block polymers in size exclusion chromatograms in THF were very close to that of the corresponding parent polystyrene. PEO-PSt-PEO with lower polystyrene content exhibited poorer solubility in THF.
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WATER-SOLUBLE AND AMPHIPLIC POLYMERS Ⅰ.SYNTHESIS AND CHARACTERIZATION OF PEO-PSt-PEO TRIBLOCK POLYMERS

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com