脲醛改性酶解木质素对丁苯橡胶阻燃性能的影响  

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

作　　者：刘小婧[1] 程贤甦[1] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108

出　　处：《合成橡胶工业》2010年第2期154-157,共4页China Synthetic Rubber Industry

基　　金：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)

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。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.

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[化学工程—橡胶工业]