By Sina Ebnesajjad
The economic PVF movie Tedlarª used to be first trademarked through DuPont 50 years in the past. due to the fact that that point it has validated itself as a polymer with very good resistance to daylight degradation (UV resistance), thermal balance, chemical assault, water absorption, and solvents. those homes, including a excessive solar power transmittance cost, have resulted in it changing into proven world wide because the number 1 selection for the Read more...
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0 Gy/s (10À100 rad/s). Polymerization rate increases sharply with the increase in dosage, leading to generation of active sites in the polymer chain and branches. Radiation polymerization of vinyl fluoride dissolved in solvents such as tetrachloromethane leads to chain transfer and incorporation of solvent in the polymer. Vinyl fluoride can also be polymerized in plasma. 6 Graft Polymerization The most effective method for graft polymerization of vinyl fluoride is radiation polymerization [23].
Harmon [31] reported preparation of vinyl fluoride by pyrolysis. Harmon’s invention described production of VF by pyrolysis of 1,1-difluoroethane, a process that had more potential for successful commercialization. S. Patent 2,425,991 [27]. In addition to being a precursor for vinyl fluoride preparation, 1,1-difluoroethane, also known as HFC-152a (R-152a), has a large application as a refrigerant and propellant because of its relatively low global warming potential and a shorter atmospheric lifetime [32].
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