Study On The Structures And Properties Of Novel Resins Using For Fluorine Coatings

There are so many special performance in fluorine resin, but some disadvantages are alsoexistence, like, higher temperature and much more time demanded for curing, and the badprimer adhesive ability, the bad compatibility with fillers, hardly dissolved in conventionalorganic solvent. And compared with other coating, it has not a higher cost-efficiency.In orderto improve these disadvantages, chlorotrifluoroethylene(CTFE) and n-butyl vinyl ether(BVE)as monomers had been chosen, different amount of maleic anhydride(MA) was added a seriesof different proportions of polymer resin were been synthesized in supercritical carbondioxide(scCO2). Owing to the chemical bond of C-F in chlorotrifluoroethylene, it gave theresins have many characteristics that fluorocarbon coatings had. There were many goodproperties, such as good gloss and hardness, and easy to be processed and so on, attribute tothe chlorine in CTFE. It made resins have a better solubility in solvent and exterior burnishand transparency, because of BVE unit of the resins. While the MA had been added, itprovided a cheap and very effective group for the resin that made the resins be easy tomodification with chemical process. The hydrolysis and esterification of anhydride groups inthe copolymer would improve the performance of the resin on a certain degree. Hydrolysiswith alcohol or polyol could make resin crosslink or improve its surface features, and expandthe application prospect of this new type fluorocarbon coatings. Characterized by infraredspectroscopy, nuclear magnetic resonance (NMR) spectra of the polymer structure, provedthat it had been be synthesized successfully of a series of poly chlorotrifluoroethylene, n-butylvinyl ether and maleic anhydride random copolymer. It was calculated that the monomercomponent in the polymer by fluorine ion selective electrode method and acid-base titrationdetermination. We had focused on the copolymer had a well thermal stability or not and thepolymer film of water contact angle with the polymer of the relationship of the proportion ofthe monomer component, and results show that the addition of MA had not only reduced thethermal stability of the copolymer, but also reduced the polymer film of water contact angle.While CTFE: BVE: MA feed mass ratio was5:5:1, polymer state changed, it can still keepthe excellent heat resistant performance and well water repellency. TGA analysis showed thatThe decomposition temperature was241℃, and the contact Angle was96.3°. But theintroduction of the active functional group MA, it was easier for polymer to be modified.Esterification with fluoride or non fluoride alcohol could change the surface properties of thecopolymer. The solubility of polymer in different polar solvents was studied，also.In recent years, it caused people’s attention about polymerization process by the way of the iodine transfer radical polymerization. Iodoalkane as a chain transfer agent in thereaction, and with the decomposition of initiator, it occurred chain transfer reaction,free withchain transfer agent. It can reduce the probability of side reaction in the polymerization, torealize it can controll the polymerization. In this article, it had been studied with the methodof the iodine transfer radical polymerization using chlorotrifluoroethylene(CTFE), vinyl(E),and3,3,3-trifluoropropane(TFP) as monomers. By adjusting the amount of the chain transfer.A series of polymer resins were successfully synthesized with the different amount of chaintransfer agent. Characterized by infrared spectroscopy, nuclear magnetic resonance (NMR)spectra of the polymer structure, proved that it had been be synthesized successfully of polychlorotrifluoroethylene, vinyl, and3,3,3-trifluoropropane copolymer. The molecular weightand molecular weight distribution was studied with the different amount of chain transferagent, and found that the method of polymerization can effectively reduce the probability ofside reaction in the polymerization, to realize it can controll the polymerization. The glasstransition temperature of the copolymer was tested, and the Tg was at74.5℃. It wasanalyzed that the thermal properties of polymer with different amount of chain transfer agent,concluded that the decomposition temperature and the thermal stability copolymer weregradually decreased with the addition of different amount of chain transfer agent.