反应详情

In a series of examples, the similar polymerization procedure described in Example 15 was carried out in a 70 ml stainless autoclave equipped with a magnetic stirrer, except adding an additional HFP comonomer. After adding 3.0 g of CF2═CFCH2CH2OSi(CH3)3, 0.1 g of (n-C4H9)3B and 20 ml CH2Cl2 under argon atmosphere, 20 ml of VDF and 5 ml of HFP were introduced into the reactor under vacuum by condensing the monomers at liquid nitrogen temperatures, then injecting with 15 ml of O2. The autoclave was warmed to room temperature or immersed in an oil bath at 40° C. or 70° C. for 20 hours. After recovering the unreacted monomers, the slurry was dried by under vacuum to obtain polymer. The polymer's molecular weight was determined by Gel Permeation Chromatography (GPC), and the terpolymer composition was determined by 1H and 19F NMR spectra. Table 2 summarizes the experimental results.

1. customequipped with a magnetic stirrer
2. addition20 ml of VDF and 5 ml of HFP were introduced into the reactor under vacuum by condensing the monomers at liquid nitrogen temperatures
3. customAfter recovering the unreacted monomers
4. customthe slurry was dried by under vacuum
5. customto obtain polymer