苎麻/LLDPE复合材料力学性能的研究

研究了成型工艺、碱液及硅烷偶联剂预处理对苎麻/LLDPE复合材料力学性能的影响。结果表明:经碱液、KH-550和A-151硅烷偶联剂分别预处理后,苎麻/LLDPE复合材料的拉伸性能均有不同程度的提高,拉伸强度由51.0MPa分别提高到102.6 MPa、83.6 MPa及89.8 MPa。经A-151预处理后,材料的弯曲强度及弯曲模量由23.1 MPa、1.58 GPa提高到81.6 MPa、6.01 GPa,单位面积总冲击能及动态弯曲强度由30.9 kJ/m2、31.3 MPa提高到37.8 kJ/m2、106 MPa。

MECHANICAL PROPERTIES OF RAMIE/LLDPE LAMINATE

The effect of molding conditions and pretreatment of ramie with alkali or silane on mechanical properties of ramie weave/LLDPE laminate is studied in this paper. The results show that the laminate, molding at 140 ℃ with a pressure of 7.35 MPa, has optimal mechanical properties. In comparison with untreated ramie, the tensile strength is increased from 51.0MPa (untreated) to 102.6, 83.6MPa and 89.8MPa respectively in case the weave used has been pretreated with alkali, KH-550 or A-151; the flexural strength, flexural modulus, total impact energy per unit area and dynamic flexural strength amount to 81.6 MPa, 6.01 GPa, 37.8 kJ/m2 and 106 MPa from 23.1MPa, 1.58 GPa, 30.9 kJ/m2 and 31.1 MPa.