Polyvinylacetophenone: Preparation, reactions, and depolymerization

Abstract

Polyvinylacetophenone was made by the Friedel‐Crafts reaction of acetyl chloride or acetyl bromide on polystyrene, in carbon disulfide, using aluminum chloride. Similar reactions, using bromoacetyl bromide or chloroacetyl chloride, gave insoluble polyvinylphenacyl halides. A soluble, low‐molecular‐weight polyvinylphenacyl chloride was obtained using chloroacetyl chloride and monomeric styrene. Polyvinylphenacyl bromides of limited Solubility were obtained by direct bromination of polyvinylacetophenone. Vacuum pyrolysis of polyvinylacetophenone gave p‐vinylacetophenone monomer in good yield. At atmospheric pressure, the product was about half p‐vinylacetophenone and half p‐ethylacetophenone. At intermediate pressure, an intermediate proportion was obtained.

Functionalization of Polystyrene with Cyclic Anhydrides and their Spectroscopic, Adhesive and Corrosive Characterizations

“…PS without additional functional groups has limited some properties such as thermal stability, mechanical strength, adhesion capability, corrosion resistance and photosensitivity. For this reason, the desired physical and mechanical properties of PS can be obtained by anchoring some functional groups (Kenyon and Wough, 1958;Swiger, 1975;Blanchette, 1958;Frechet et al, 1979). Thus, the undesired properties of PS can be improved using different reagents by modification reactions.…”

Electrochemical synthesis and electrochromic application of a novel polymer based on carbazole

“…Some of these synthesis methods, including copolymerization with the bonding of certain functional groups [17][18][19][20][21] modified with electro-active moieties such as, thiophene [22], fluorine [23], carbazole and pyrrole, which have been used to form electrochromic polymers with useful properties for their various applications [24][25].…”

Observation of triad stereosequences in a polystyrene derivative

“…16 The mm content of the resulting polymer was 0.72, based on the intensity of the lowest field methine proton resonance area, indicating that the polymer configuration does not change under the acetylation conditions employed and that the resonance assignments provided in Figure 1C are probably valid. 16 The mm content of the resulting polymer was 0.72, based on the intensity of the lowest field methine proton resonance area, indicating that the polymer configuration does not change under the acetylation conditions employed and that the resonance assignments provided in Figure 1C are probably valid.…”

“…16 The 300-MHz 'H NMR spectrum of the product, poly@-acetyl-P,P-dideuteriostyrene), is shown in Figure 1C. We therefore investigated the 300-MHz 'H NMR spectra of various para-substituted polystyrenes (substituent: F, Br, C1, NH,, CH3C0, CN) prepared by AIBN- To observe the (mr + rm)-and rr-methine proton resonances of poly(pacety1styrene) independently of methylene proton resonances, a sample of poly(P,P-dideuteriostyrene) prepared by AIBN-initiated polymerization at 65 "C was acetylated according to the procedure of Kenyon and Waugh.…”