反应详情

In a series of examples, the similar polymerization procedure described in Example 6 was carried out in a 70 ml stainless autoclave equipped with a magnetic stirrer. After adding 3.0 g of CF2═CFCH2CH2Si(CH3)2H, 0.1 g of (n-C4H9)3B and 20 ml CH2Cl2 under argon, 20 ml of VDF and 5 ml of HFP were introduced into the reactor under vacuum by condensing the monomers at liquid nitrogen temperatures. About 15 ml of O2 was then introduced to initiate the polymerization. The autoclave was warmed to room temperature gradually and then immersed in an oil bath at various temperatures (room temperature (r.t.), 40° C., 60° C., 80° C., and 100° C. for 20 hours. After recovering the unreacted monomers, the slurry was dried under vacuum to obtain a white polymer powder. The terpolymer molecular weight was determined by Gel Permeation Chromatography (GPC), and the terpolymer composition was determined by 1H and 19F NMR spectra. Table 1 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. customthe polymerization
4. customimmersed in an oil bath at various temperatures
5. customAfter recovering the unreacted monomers
6. customthe slurry was dried under vacuum
7. customto obtain a white polymer powder