摘要
采用间苯二酚-甲醛(RF)树脂改性淀粉,通过乳液共沉法制备淀粉/NR复合材料,研究改性淀粉用量对复合材料性能的影响,并与相同体积分数的炭黑和偶联剂Si69改性的白炭黑填充的NR复合材料进行对比。试验结果表明,RF树脂的加入增强了淀粉与NR之间的交联作用,提高了淀粉/NR复合材料的物理性能;当淀粉用量为20份、经3.6份RF树脂改性后,复合材料的综合性能最佳;随着改性淀粉用量的增大,复合材料的硬度和300%定伸应力增大。当填料体积分数相同时,改性淀粉对NR的补强效果与炭黑接近,且优于白炭黑。
The starch was modified by resorcinol-formaldehyde（RF） resin,a starch/NR composite was prepared by emulsion co-coagulation method,and the influence of addition level of modified starch on the properties of composites was investigated and compared to NR composite filled by the same volume fraction of carbon black and Si69 modified silica.The results showed that,the cross-linking reaction between starch and NR was strengthened,the physical properties of starch/NR composite were improved;the comprehensive properties of the composite containing 20 phr starch and 3.6 phr RF resin were best;Shore A hardness and modulus at 300% elongation of the composites increased as the addition level of modified starch increased.When the volume fractions of fillers were the same,the reinforcement effect of the modified starch was similar to that of carbon black and better than that of silica.
出处
《橡胶工业》
CAS
北大核心
2010年第5期261-267,共7页
China Rubber Industry
基金
国家自然科学基金资助项目(50673010)
关键词
淀粉
NR
复合材料
酚醛树脂
改性
starch
NR
composite
resorcinol-formaldehyde resin
modification
