PVN = polyvinyl nitrate

PVN (Polyvinyl Nitrate) was first prepd in Germany and patented in 1938 in the US. 

Polyvinylalcohol (PVA, Alvyl, Resistoflex, Solvar). A polyhydric alcohol polymer used chiefly as the starting matl for Polyvinyl Nitrate (PVN) (qv), (C2H40)x or... 

With the advent of polymer chemistry in recent times, numerous efforts have been made to develop synthetic polymers containing nitro groups which may replace NC. In this regard, polyvinyl nitrate (PVN) needs some discussion. 

Polyvinyl nitrate [Structure (2.6)], originally thought to be a replacement for NC (at least partly), had been explored by a number of groups [1-3] who concluded that the propellants based on PVN (on replacement of NC by PVN) have the properties comparable heat of explosion and burning rate, decreased tensile strength, increased elongation and pressure exponent (n) and hence PVN is not acceptable as a replacement of NC [4]. 

Vinyl Polymers. See in Vol 8, P353-R to P358-R under Polyvinylacetate, Polyvinylalcohol, Polyvinyl Chloride or Polyvinyl Nitrate (PVN) and in this article under appropriate entries... 

Polyesters of din i trocar boxy tic acids and dinitrodiols Polymer with O-nitro groups Polyvinyl nitrate (PVN)... 

Properties of PVN Explosive properties Preparation of polyvinyl nitrate Practical use of polyvinyl nitrate Modifications of polyvinyl nitrate Hydrazine and difluoroamine polymers Af-Nitro polymers Plastic bonded explosives References... 

Figure 11 shows the complex index spectra of the three polymers of interest polymethylmethacrylate (PMMA), polyvinyl nitrate (PVN), and nitrocellulose (NC). These were obtained as described above from sets of IR reflection data obtained every 5° from 25 to 80° at both s and p polarization for each material. The spectra for PMMA agree substantially with those found in the literature [98]. 

PVN was first prepd in Ger in 1929 (Ref 1) by the nitration of polyvinyl ale with mixed nitric-sulfuric acid The highest yield was 80% but the product contained only 10% N, against a theoretical value of 15.75%. It detonated when heated... 

---