Degradation of new cellulose-based complex material

The degradation of a kind of cellulose-based complex material was investiga ted by the soil bury and exposure methods. The results showed that the aver age molecular weight of the sample decreased 66.7% and the copper number in creased from 1.32 to 7.58 after 9 weeks as measured by the soil bury method . Meanwhile the average molecular weight decreased 38.7% and the copper num ber increased from 1.32 to 5.00 after 14 weeks of exposure under the sun. ( C) 2001 John Wiley & Sons, Inc.