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	合成橡胶工业 CHINA SYNTHETIC RUBBER INDUSTRY 2010 Vol.33 No.2 P.154-157

脲醛改性酶解木质素对丁苯橡胶阻燃性能的影响

刘小婧　程贤甦　

摘　要：以脲醛改性酶解木质素配合自制的微胶囊红磷(MRP)制得高分子膨胀阻燃剂,用傅里叶变换红外光谱和差示扫描量热法对其进行了表征,并将其添加到丁苯橡胶(SBR)中,研究了SBR的阻燃性能和力学性能.结果表明,脲醛改性酶解木质素在280 ℃附近出现了1个较强的吸热峰;随着改性酶解木质素或MRP用量的增加,SBR的阻燃性能提高;当改性酶解木质素用量为60份、MRP用量为10份时,或当改性酶解木质素用量为40份、MRP为12份时,SBR的阻燃级别均可达到FV-0级;SBR/改性酶解木质素/MRP共混物的燃烧残渣表面生成了连续而致密的炭层,孔洞很少且细小.当改性酶解木质素用量为40份时,SBR硫化胶具有最佳的拉伸性能;当MRP用量为10份时,SBR硫化胶的综合性能较好.
关键词：脲醛;改性;酶解木质素;微胶囊红磷;丁苯橡胶;阻燃性能;力学性能
分类号：TQ333.1　文献标识码：B
文章编号：1000-1255(2010)02-0154-04

Effects of enzymatic hydrolysis lignin modified by urea formaldehyde on fire-retardance of styrene-butadiene rubber

Liu Xiaojing（College of Materials Science and Engineering,Fuzhou University, Fuzhou 350108, China）　 Cheng Xiansu（College of Materials Science and Engineering,Fuzhou University, Fuzhou 350108, China）　

Abstract：The composite of urea formaldehyde modified enzymatic hydrolysis (EH) lignin and micro encapsulated red phosphorus (MRP) was prepared as a new kind of expansion fire-retardant for polymer. The structures and heat performance of EH lignin modified were characterized by Fourier transform infrared spectroscopy and differential scanning calorimetry. The fire-retardance and mechanical properties of styrene-butadiene rubber(SBR) with the modified EH lignin and MRP were investigated. The results showed that there was a strong decalescence at 280 ℃ during the heating process. The flame-retardance were improved when the amount of the modified EH lignin or MRP was increased. The vertical ignition grade of modified SBR all reached FV-0 when the system had 60 phr modified EH lignin and 10 phr MRP, or 40 phr modified EH lignin and 12 phr MRP. The char residue structure of SBR/lignin/MRP composites were continuous and compact, with small holes on their surfaces. In addition, the tensile strength of SBR/lignin/MRP composites were the best when the system had 40 phr modified EH lignin. The integration properties of SBR were better when the system had 10 phr MRP.
Keywords：urea formaldehyde; modification; enzymatic hydrolysis lignin; micro encapsulated red phosphorus; styrene-butadiene rubber; fire-retardance; mechanical property

基金项目：中国科学院广州化学所纤维素开放实验室基金资助项目(LCLC-2004-158);福建省发改委发明专利转化基金资助项目(827025).
作者简介：刘小婧(1985-),女,硕士研究生.已发表论文2篇.
作者单位：刘小婧（福州大学,材料科学与工程学院,福建,福州,350108）　
　　　　　程贤甦（福州大学,材料科学与工程学院,福建,福州,350108）　

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收稿日期：2009年8月13日

修稿日期：2010年2月3日

出版日期：2010年3月15日