Polymerization of Aldehydes

Kamio, Kosaku; Kojima, Shimpei; Daimon, Hiroshi

doi:10.1246/nikkashi1898.66.2_246

The Journal of the Society of Chemical Industry, Japan

1963

DOI: 10.1246/nikkashi1898.66.2_246

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Polymerization of Aldehydes

Kosaku Kamio¹,

Shimpei Kojima²,

Hiroshi Daimon³

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1965

1969

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Several reactions of poly(vinyl alcohol)–type acetaldehyde polymer

Matsubara

Imoto

1969

J of Applied Polymer Sci

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SynopsisThe preparation of the acetaldehyde polymers (PACH) having a poly(viny1 alcohol)-type structure and the thermal degradation of PACH have been reported previously. This paper will describe detailed aspects of several reactions of PACH. Copolymerization of PACH with toluene diiiocyanate (TDI) was performed both thermally andcatdytically. When piperidine was used as catalyst, the rate of reaction between PACH and TDI was found to depend on the concentration of both the active hydrogen of PACH and the isocyanate group of TDI. Acid and alkali treatment of PACH were carried out. On treatment with sulfuric acid, white polymers with good spinnability were obtained. The copolymerizations of acetaldehyde with n-butylaldehyde were performed in the presence of sodium amalgam as catalyst. The reaction products were colorless, viscous liquids and assumed from the infrared and NMR spectra, elemental analyses, molecular weights and solubility tests to be aldol condensation-type copolymers.

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Several reactions of poly(vinyl alcohol)–type acetaldehyde polymer

Matsubara

Imoto

1969

J of Applied Polymer Sci

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Poly(chloroaldehydes). II. Polymerization of chloral

Rosen¹,

Sturm²,

McCain³

et al. 1965

J. Polym. Sci. A Gen. Pap.

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Chloral was polymerized by means of cationic and anionic initiators and the products compared. Anionic catalysts readily produce high molecular weight polymer (DP ∼ 300–600), but a DP of only 200 could be produced with cationic catalysts. The anionic system apparently initiates and propagates polymerization much more readily than the cationic system. This effect is attributed to the inductive effects of the chlorine atoms on the chloral. Little difference was found when products of similar DP were compared as to x‐ray diffraction pattern, infrared spectrum and tractability. This is believed due to the single type of structure which is sterically favored. Various cyclic compounds of chloral could not be made to undergo polymerization under cationic initiation. The conditions required to effect ring opening were too rigorous to enable polymerization to take place.

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Polymerization of Aldehydes

Cited by 2 publications

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Several reactions of poly(vinyl alcohol)–type acetaldehyde polymer

Several reactions of poly(vinyl alcohol)–type acetaldehyde polymer

Poly(chloroaldehydes). II. Polymerization of chloral

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