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Improving the thermal stability of polystyrene by Friedel-Crafts chemistry

1997; Elsevier BV; Volume: 57; Issue: 3 Linguagem: Inglês

10.1016/s0141-3910(97)00013-x

1873-2321

Jinming Li, Charles A. Wilkie,

Synthetic Organic Chemistry Methods

The alkylation of polystyrene with a difunctional alkylating agent, such as 1,4-benzenedimethanol, proceeds in the presence of a zeolite catalyst to give a significant amount of cross-linked, and thermally stable, polymer. Various zeolites are used as catalysts; there is apparently some relationship between the type of zeolite and its catalytic activity. The extent of cross-linking depends upon temperature. With some zeolites there is no reaction below 300 °C while others will permit reaction below 300 °C. A significant fraction of the polymer does not volatilize at 800 °C in a nitrogen atmosphere.