تفاعل #677819

معادلة التفاعل

ethylene

CTFE

tert-butyl peroxypivalate

2,5-bis(tert-butylperoxy)-2,5-dimethylhexane

Br—CF2—CFCl—CH2—CH2—Br

→

Br—CF2—CFCl—CH═CH2

المذيبات

1,1,1,3,3-pentafluorobutane

ظروف التفاعل

المعالجة

1. 1
   أخرىA supply of BCTFB was obtained
2. 2
   أخرىat 120° C.
3. 3
   أخرىfor 4 hours
4. 4
   workup.DISTILLATIONafter distillation under vacuum
5. 5
   درجة الحرارةin refluxing methanol for 15 hours

الإجراء التجريبي

A supply of BCTFB was obtained by reacting ethylene with dibrominated CTFE in 1,1,1,3,3-pentafluorobutane at 120° C. for 4 hours using a mixture of tert-butyl peroxypivalate (TBPPi, 3 mol %) and 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane (Trigonox 101, 4.5 mol %) as radical initiators, with the resulting structure being Br—CF2—CFCl—CH2—CH2—Br after distillation under vacuum. This was dehydrochlorinated with KOH in refluxing methanol for 15 hours, forming Br—CF2—CFCl—CH═CH2 (BCTFB). Successful radical copolymerization of CTFE (96 mol % in the feed) with BCTFB initiated by TBPPi (2 mol % with respect to both monomers) was carried out at 74° C. in a 100 mL autoclave. The 19F NMR spectrum of the obtained polymer is shown in FIG. 7.

المصدر