K. Matsuzaki et J. Masamoto, POLYMERIZATION OF FORMALDEHYDE USING TETRAVALENT ORGANOTIN COMPOUNDS AS AN INITIATOR, Industrial & engineering chemistry research, 37(5), 1998, pp. 1729-1735
Polymerization of gaseous formaldehyde in hexane using various initiat
ors including tetravalent organo-tin compounds was investigated. The e
nd group of the obtained polymer was examined and it was concluded tha
t the chain-transfer agents (such as methanol, etc.) were almost compl
etely consumed during the polymerization of gaseous formaldehyde. Only
two series of initiators, quaternary ammonium salt and dialkyltin dim
ethoxide compounds, produced a polymer with a narrow-molecular-weight
distribution (M-w/M-n = 2). The polymer with the narrow-molecular-weig
ht distribution (M-w/M-n = 2) produced a product with high Dart impact
strength. The polymer with the broad-molecular-weight distribution (M
-w/M-n > 2.9) gave the product with low Dart impact strength.