Polyfvinylidene chloride

Vinylidene chloride polymerises spontaneously into polyfvinylidene chloride), a polymer sufficiently thermally unstable to be unable to withstand melt processing... 

Hasegawa, R., Takahashi,Y., Kobayashi,M Chatani,Y., Tadokoro.H. Crystallization of polymers under high pressure — High pressure modifications of polyfvinylidene chloride) and others. 19th Polymer Symposium, Japan (Oct. 1970) Kyoto. 

The reader should note that stereoisomerism does not exist if the substituents X and Y in the monomer 4-14 are identical. Thus there are no configurational isomers of polyethylene, polyisobutene, or polyfvinylidene chloride). It should also be clear that 1,2-poly-butadiene (reaction 4-3) and the 1,2- and 3,4-isomers of polyisoprene can exist as isotactic, syndiotactic. and atactic configurational isomers. The number of possible structures of polymers of conjugated dienes can be seen to be quite large when the possibility of head-to-head and head-to-tail isomerism is also taken into account. 

On account of its low thermal stability, polyfvinylidene chloride) is seldom used in paints. Vinylidene chloride copolymers with vinyl chloride, acrylonitrile, or acrylates are mainly employed. These heat-sealable copolymers are efficient gas barriers and have an outstanding resistance to chemicals. They are marketed as solid resins and dispersions. Vinylidene chloride copolymers are mainly used for coating foodpackaging foils. They are also important in paint coatings where good chemical resistance is required. 

Ixan Polyfvinylidene chloride) copolymers, PVDC Solvay Cie SA... 

Blends of chlorinated-PVC (CPVC) and TPU have been shown to be immiscible despite the fact that the blends exhibit single T peak. Transmission electron microscopy (TEM) revealed a two-phase structure witfi domain size varying from d = 0.1 to 1.5 pm [30]. Other blends, such as polyfvinylidene chloride-co-vinyl chloride)/TPU, are optical clear with thermal behaviors, indicating complete miscibility in the blends [31]. 

Comparison of Table 5.4 and 5.7 allows the prediction that aromatic oils will be plasticisers for natural rubber, that dibutyl phthalate will plasticise polyfmethyl methacrylate), that tritolyl phosphate will plasticise nitrile rubbers, that dibenzyl ether will plasticise polyfvinylidene chloride) and that dimethyl phthalate will plasticise cellulose diacetate. These predictions are found to be correct. What is not predictable is that camphor should be an effective plasticiser for cellulose nitrate. It would seem that this crystalline material, which has to be dispersed into the polymer with the aid of liquids such as ethyl alcohol, is only compatible with the polymer because of some specific interaction between the carbonyl group present in the camphor with some group in the cellulose nitrate. 

Polyfvinylidene chloride) As above Resembles hydrochloric acid As above... 

Polyfvinylidene chloride cyanide- 1,3-cyclohexadiene) Poly(chlorotrifluoroethylene-co-vinyhdene fluoride)... 

Fig. 15. Changes of the glass transition temperature for a series of poisoner solutions and an effort to fit the data to equations 42 to 44. [PMMA = poly(methyl methacrylate), PVF2 = polyfvinylidene fluoride), PEO = poly(ethylene oxide), PEA = poly(ethylene adipate), PBA = polyfbutylene adipate), PVC = poly(vinyl chloride), PCL = poly(e-caprolactone)].

Figure 11.26 The relationship between AK and fatigue crack growth rates for poly(methyl methacrylate), PMMA polysulfone, PSF polystyrene, PS polyfvinyl chloride), PVC poly(2,6-dimethyl-1,4-phenylene oxide), PPO polycarbonate, PC nylon 66 and polyfvinylidene fluoride), PVp2 (49). Samples with data to the right are more fatigue resistant than on the left, because they require higher levels of stress at the crack tip to propagate the crack.

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