【摘要】 采用微波技术替代传统热源,以D,L-丙交酯为原料,加入纳米有机蒙脱土(OMMT)及增塑剂聚乙二醇(PEG)进行原位插层聚合制备聚乳酸(PLA)/OMMT/PEG纳米复合材料。在微波功率90 W下作用10 min,w(OMMT)和w(PEG)分别为1%,0.8%时,复合材料拉伸强度达15.39 MPa,拉伸断裂应变为11.67%,热失重中心温度提高6.6℃。形貌分析结果表明,OMMT以剥离形态均匀分散于PLA中,复合材料趋向于韧性断裂。土壤填埋实验结果表明,该复合材料具备更好的降解性能。更多还原

【Abstract】 Polylactide(PLA) based nano-composite was prepared by in situ intercalation polymerization with D,L-lactide, nano organo-montmorillonite(OMMT) and plasticizer poly(ethylene glycol)(PEG) under microwave irradiation in place of conventional heat resource.When the reactants were irradiated at 90 W for 10 min and the mass content of the OMMT and PEG were 1%and 0.8%,respectively,the tensile strength and tensile strain at break of the resultant nano-composite reached 15.39 MPa and 11.67%,respectively.The central temperature of heating mass loss of the nano-composite was elevated by 6.6℃compared with pure PLA.The morphological analyses show that the OMMT with exfoliated structure is evenly dispersed in the polymer matrix,and the nano-composite tends to be of ductile rupture.The soil-burial degradation experiment reveals that the PLA/OMMT/PEG nano-composite possesses a superior degradation performance.更多还原