无卤阻燃SBR热失重行为研究  

Study on Thermal Weight Loss of SBR Flame Retarded by Halogen Free Flame Retardant

作　　者：苑宾[1] 李荣勋[1] 

机构地区：[1]青岛科技大学高性能聚合物及成型技术教育部工程研究中心,山东青岛266042

出　　处：《世界橡胶工业》2015年第4期10-16,共7页World Rubber Industry

摘　　要：利用热重法（TG）和锥形量热仪（Cone）研究了以几种不同种类阻燃剂阻燃的丁苯橡胶在氮气、空气气氛中的热失重行为和燃烧性能。TG结果表明：不同的裂解气氛显著地影响了样品的热裂解过程。在氮气气氛下,三个试样均有两个失重台阶,这两个过程主要发生在200~500℃,分别是助剂的分解和丁苯橡胶的分解,500℃时三组试样固体残留物的量分别为37.9%、37.1%、38.6%。在空气气氛下,三个试样均有三个热失重台阶,分别是助剂的分解、丁苯橡胶的分解、成炭物的分解,前两个过程与氮气气氛中一样主要发生200~500℃,500℃时三组试样固体残留物的量分别为40.3%、52.0%、42.1%,均高于氮气气氛中的残余质量,说明样品在空气中容易形成更多的炭化物;成炭物的分解发生在500~800℃,500~650℃时三组试样失重分别为8.7%、29.2%、10.9%,说明Al（OH）3/P阻燃丁苯橡胶虽然在500℃时残余质量最高,但是残炭物质耐热性较差,所以失重较多。Cone实验表明：在试样燃烧的初始阶段,Al（OH）3/P阻燃体系成炭量大,对降低热释放速率（HRR）起主要作用;在试样燃烧的中后期,APP（聚磷酸铵）/PER（季戊四醇）阻燃体系对降低HRR起主要作用。The thermo-gravimetric analysis（TG） and cone calorimeter test （CONE） were used to investigate the thermo-gravimetric and flame retardant properties of SBR with APWPER, A1 （OH） 3/ P and APP/PER/A1 （OH）JP as the flame retardant in nitrogen atmosphere and in the air. The TG results indicate that different pyrolysis atmosphere significantly affects the thermal cracking process of the sample. Under nitrogen atmosphere, each of the three specimens has two weightlessness steps： additives decomposition and SBR decomposition. The solid residues quality of the three samples at 500℃ respectively is 37.9%, 37.1% and 38.6%.Under air atmosphere, each of the three specimens has thermo-gravimetric steps, which respectively is additive decomposition, SBR decomposition and carbon content decomposition. The former two processes mainly take place at 200-500 ℃, just like the processes at nitrogen atmosphere. At 500 ℃, the solid residues quality of the three samples respectively is 40.3%, 52.0% and 42.1%, which is higher than the residual in nitrogen atmosphere. So it is easier to tbrm carbide in the air. The residue carbon decomposition take place at 500-800 ℃. At 500-650 ~C, the weightlessness of the three sets of sample were 8.7%, 29.2%, 10.9%, so the heat resistance of residual carbon material of the retardant SBR with Al （OH） 3/P is poor although the sample＇s residual quality is the highest （500 ℃）. Cone experiments show that in the early stage of the combustion, AI （OH）jP plays a main role to reduce the HRR by forming a large amount of carbide. In the middle process of burning, APWPER plays a main role to reduce the HRR.

关 键 词：丁苯橡胶(SBR) 无卤阻燃 热失重 锥形量热仪 

分 类 号：TQ333.1[化学工程—橡胶工业]