摘要
以木质素(lignin)和陶土(clay)为原料,混合球磨制备了木质素/陶土复合物(CLC),并将其作为填料制备了木质素-陶土/丁腈橡胶(CLC/NBR)复合材料。首先,探讨了在填料为50份数时,填料组成对NBR复合材料的硫化特性、交联密度、力学性能、老化性能和玻璃化转变温度(T_g)的影响。基于优化的填料组成比例,研究了不同填料份数对NBR复合材料力学性能的影响。研究结果表明:在填料份数为50时,陶土与木质素比例为100∶40时,其综合性能较好,拉伸强度、断裂伸长率、300%定伸应力和老化后拉伸强度保持率分别为16.1 MPa、697%、3.2 MPa和62%;CLC/NBR复合材料的Tg相对未填充丁腈橡胶上升了6.8℃。在陶土与木质素比例为100∶40时,当填料份数为60,其拉伸强度、断裂伸长率和300%定伸应力分别为17.5 MPa、734%和3.4 MPa。
The lignin-clay/NBR composites（CLC/NBR） were prepared by mechanical blending of NBR with lignin-clay complex（CLC）, a mixture obtained from the lignin and clay prepared by ball-milling. Effects of the different ratio of lignin to clay at a CLC loading of 50 phr on the curing characteristics, crosslinking densities,mechanical properties, thermo-oxidative aging properties and the glass-transition temperature（Tg） of the CLC/NBR composites were also evaluated. The influence of the loading of CLC on the mechanical properties of CLC/NBR composites was also explored. The experimental results indicated that the best comprehensive performance was obtained when the ratio of clay to lignin was 100 to 40 at a CLC loading of 50 phr; the tensile strength,elongation at break and 300% modulus of rubber composite were 16.1 MPa, 697% and 3.2 MPa, respectively; the retention of tensile strength after aging of rubber composites was 62%; the Tg of CLC/NBR composites was increased by 6.8℃ compared to the NBR without fillers; when the loading of CLC was 60 phr, the ratio of the lignin to clay was 100：40, the tensile strength, elongation at break and 300% modulus of NBR composite were17.5 MPa, 734% and 3.4 MPa, respectively.
出处
《精细化工中间体》
CAS
2016年第1期74-79,共6页
Fine Chemical Intermediates
基金
湖南师范大学潇湘学者启动资金资助课题(化050613)
