二醋酸纤维素和聚己内酯单丙烯酸酯接枝共聚物的生物降解性能研究

Biodegradable Properties of Graft Copolymer of Cellulose Diacetate with Polycaprolactone Monoacrylate

通过在土壤和活性淤泥中进行生物降解的研究结果表明,二醋酸纤维素(CDA)和聚己内酯单丙烯酸酯(PCLA)的接枝共聚物(CDA-g-PCLA)在活性淤泥中的降解失重率要略高于在土壤中的降解失重率。CDA-g-PCLA的特性粘数在降解初期呈上升趋势,30 d左右达到峰值后呈下降趋势。CDA-g-PCLA和CDA随降解时间的延长,拉伸强度下降,断裂伸长率增大。

The biodegradable properties of CDA-g-PCLA and CDA were analyzed in soil and active sludge. The biodegradability of CDA-g-PCLA graft copolymers in active sludge was higher than that in soil. The intrinsic viscosities of CDA-g-PCLA graft copolymers increased at early stage in soil and active sludge and reached the maximum about 30 days. The tensile strength and elongation at break of CDA-g-PCLA graft copolymers and CDA decreased and increased respectively with the biodegradable time.