【摘 要】
：
A novel hydroxypolyether blocked polydimethylsiloxane,poly(ethylene oxide)propyl-b-polydimethylsiloxane-b-propyl poly(ethylene oxide)(PEO-b=PDMS-b-PEO)was synth
【机 构】
：
CAS Key Laboratory of Soft Matter Chemistry
论文部分内容阅读
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.
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