反应详情

The procedure of Example 15 was followed in a 200 ml stainless autoclave equipped with a magnetic stirrer. After adding 1.68 g of CF2═CFCH2CH2OSi(CH3)3, 91 mg of (n-C4H9)3B, and 100 ml CH2Cl2 under argon, 50 ml of VDF was introduced into the reactor under vacuum by condensing the monomers at liquid nitrogen temperatures. About 4 ml of O2 was then introduced to initiate the polymerization. The autoclave was slowly warmed to room temperature and then kept at room temperature for 20 hours. After recovering the unreacted monomers, the slurry was poured into methanol, and the participated polymer powder was dried under vacuum for 24 hours at 80° C. The overall polymer yield was about 40%, and the polymers molecular weight determined by intrinsic viscosity was Mv=82,000 g/mole. The composition of the copolymer, containing 1.4 mole % of CF2═CFCH2CH2OSi(CH3)3 units, was determined by 1H NMR spectra.

1. customequipped with a magnetic stirrer
2. addition50 ml of VDF was introduced into the reactor under vacuum by condensing the monomers at liquid nitrogen temperatures
3. customthe polymerization
4. customAfter recovering the unreacted monomers
5. additionthe slurry was poured into methanol
6. customthe participated polymer powder was dried under vacuum for 24 hours at 80° C