酶解木质素阻燃剂的制备及其对TPO阻燃性能的影响  

Preparation of Lig-based intumescent flame retardant and its effect on flame resistance of TPO

作　　者：王栖桐[1] 冯钠[1] 刘俐[2] 王志超[1] 曲敏杰[1] 张红[1] 温艳慧 Wang Xitong;Feng Na;Liu Li;Wang Zhichao;Qu Minjie;Zhang Hong;Wen Yanhui(School of Material Science and Engineering, Dalian Polytechnic University, Dalian 116034, China;School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁省大连市116034 [2]大连工业大学信息科学与工程学院,辽宁省大连市116034

出　　处：《合成树脂及塑料》2017年第1期6-10,共5页China Synthetic Resin and Plastics

基　　金：辽宁省科学技术计划面上项目(2015020217)

摘　　要：以酶解木质素(Lig)为炭源,采用化学接枝法制备了Lig基膨胀阻燃剂——磷氮接枝改性Lig(PNLig),并对其结构进行分析和表征。将PN-Lig与聚烯烃热塑性弹性体(TPO)复合制备TPO/PN-Lig复合材料,研究其对TPO阻燃性能、燃烧后残炭炭层的化学组成、微观结构和热稳定性的影响。结果表明:P元素和N元素成功接枝到Lig上;PN-Lig中的C,P,N三种元素的质量分数分别为45.10%,29.68%和0.52%,达到了膨胀阻燃剂元素含量的要求;TPO/PN-Lig复合材料的极限氧指数达到27.4%,垂直燃烧等级达到V-0级;PN-Lig中的磷酸酯键使炭源脱水成炭,炭层完整且蓬松多孔,成炭效果明显;TPO/PN-Lig复合材料在700℃时的残炭率达到23.16%,热稳定性明显改善。Enzymatic hydrolysis lignin(Lig)was used as char-forming agent to prepare a Lig-basedintumescent flame retardant,phosphorus-nitrogen grated Lig(PN-Lig)via grafting.The structure of PN-Ligwas characterized.Then it was combined with thermoplastic polyolefin elastomers(TPO)to prepare TPO/PNLig,whose impacts on flame resistance of TPO,chemical composition,microstructure,and thermal stabilityof char layer of carbon residue after burning TPO were investigated.The results show that P and N have beengrafted to Lig and45.10%of C,29.68%of P and0.52%of N in mass fraction are in PN-Lig,which meets thedemand of intumescent flame retardant.The limiting oxygen index of TPO/PN-Lig composites is up to27.4%andthe vertical burning of the composites passes V-0rating.The phosphate bond in PN-Lig causes carbon resourcedehydrating and form char layer that is complete,fluffy and porous.The residual carbon in TPO/PN-Lig reaches23.16%at700℃,which represents higher thermal stability.

关 键 词：聚烯烃热塑性弹性体 膨胀型阻燃剂 复合材料 酶解木质素 阻燃性能 

分 类 号：TQ334.2[化学工程—橡胶工业] TQ314.248