Citation: Wei Hu Li, Xing Yuan Zhang, Jia Bing Dai. Synthesis and characterization of a novel hydroxypolyether blocked polydimethylsiloxane PEO-b-PDMS-b-PEO[J]. Chinese Chemical Letters, ;2008, 19(10): 1209-1211. doi: 10.1016/j.cclet.2008.07.021 shu

Synthesis and characterization of a novel hydroxypolyether blocked polydimethylsiloxane PEO-b-PDMS-b-PEO

CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China

Received Date: 6 May 2008

Fund Project: Financial supports from the National Natural Science Foundation of China (No. 50273035) and Anhui Provincial Education Department (No. 2004kj362zd) are acknowledged.

A novel hydroxypolyether blocked polydimethylsiloxane,poly(ethylene oxide) propyl-b-polydimethylsiloxane-b-propyl poly(ethylene oxide)(PEO-b-PDMS-b-PEO)was synthesized by simple hydrosilation reaction of poly(ethylene glycol) monoallyl ether with α,ω-dihydrogen terminated PDMS(HPDMS).Fourier transform infrared spectroscopy(FTIR) and ¹H NMR were used to identify the structure of PEO-b-PDMS-b-PEO and intermediate product HPDMS.Based on the effect investigations of temperature.reactant molar ratio,catalyst and time on the hydrosilation,it Was found that the conversion of Si-H bond to Si-C bond increased with the increase of catalyst and time,and the reaction completed when the content of catalyst Was 22 μg/g and the time Was 5 h,respectively.Urethane reaction of OH and NCO group confirms that PEO-b-PDMS-b-PEO is more reactive toward to diisocyanate than α,ω-dihydroxylbutyl terminated PDMS.
- Synthesis,
- Polydimethylsiloxane,
- Hydrosilation reaction,
- Reactivity
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