MODIFIED POLY(VINYL ALCOHOL) AS A DISPERSANT IN SUSPENSION POLYMERIZATION OF VINYL-CHLORIDE .3. ACETALIZED POLY(VINYL ALCOHOL) | Health & Environmental Research Online (HERO)

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HERO ID

4087681

Reference Type

Journal Article

Title

MODIFIED POLY(VINYL ALCOHOL) AS A DISPERSANT IN SUSPENSION POLYMERIZATION OF VINYL-CHLORIDE .3. ACETALIZED POLY(VINYL ALCOHOL)

Author(s)

Macho, V; Fabini, M; Rusina, M; Bobula, S; Harustiak, M

Year

1994

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Journal

Polymer
ISSN: 0032-3861

Volume

Issue

Page Numbers

5773-5777

Language

English

DOI

10.1016/S0032-3861(05)80055-2

Web of Science Id

WOS:A1994PZ47300024

URL

http://://WOS:A1994PZ47300024
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Abstract

Poly(vinyl alcohol) (PVA) Sloviol R was modified to different degrees by acetalization reactions with aldehyde (formaldehyde, acetaldehyde, propionaldehyde and n-butyraldehyde) for 6 h at 60 degrees C in the presence of HCl as catalyst. Samples of the modified PVA were tested as dispersants in vinyl chloride suspension polymerization. The grains of poly(vinyl chloride) (PVC) powder produced are more compact, not very porous, have a higher bulk density and lower plasticizer absorption. By increasing the degree of acetalization, the bulk density of the PVC produced decreases. Using a mixture of commercial PVA Alcotex 72.5 (which produces porous PVC with a low bulk density) and acetalized PVA, PVC with a grain morphology can be obtained.

Keywords

POLY(VINYL ALCOHOL); VINYL CHLORIDE; SUSPENSION POLYMERIZATION