Flame-Retarding Properties of Ion-Exchanging Groups Introduced into Beech Sawdust

摘要

Ion exchangers prepared form beech sawdust by introduction of weak and strong basic ion-exchanging groups were analysed with themogravimetry, differential scanning calorimetry and limited oxygen index methods to evaluate their thermal stability and flame-retarding properties. By cross-linking with epichlorohydrin in the presence of NH_4OH, ion exchangers in free form or in H_3BO_3 or H_3PO_4 form were obtained with increased thermal stability in Comparison to the starting material.