炭黑对热固性SMC材料储存期的影响  

The Effect of Carbon Black on the Storage Life of Thermosetting SMC Materials

作　　者：吴星 林昌炳 吴建斌 Wu Xing;Lin Changbing;Wu Jianbin(Guangdong Brand Builder New Materials Co.,Ltd.,Zhaoqing 526238,China)

机构地区：[1]广东百汇达新材料有限公司,广东肇庆526238

出　　处：《广东化工》2024年第19期48-50,100,共4页Guangdong Chemical Industry

摘　　要：不饱和热固性SMC材料的主要特征之一是其固化过程具有不可逆的特点,与热塑性塑料不同的是,SMC材料固化后,无法通过物理或者化学的方法,使其回到固化前的状态,所以,如若不饱和热固性SMC材料在保存期出现预固化的情况,则会影响材料的正常使用,导致成型缺陷或材料报废的风险。故延长SMC材料的保质期是稳定生产的重要因素。本文主要通过无转子硫化仪,测定添加不同类型炭黑的SMC材料的硫化时间曲线,以及测试不同预固化度材料的力学性能,得出在一定范围内炭黑类型的BET比表面积越大,保质期越短,且预固化度越高,其力学性能越低的结论。One of the main characteristics of unsaturated thermosetting SMC materials is that their curing process is irreversible.Unlike thermoplastic plastics,SMC materials cannot be restored to their pre curing state through physical or chemical methods after curing.Therefore,if unsaturated thermosetting SMC materials undergo pre curing during their storage period,it will affect their normal use,leading to the risk of forming defects or material scrap.Therefore,extending the shelf life of SMC materials is an important factor for stable production.This article mainly uses a rotor less vulcanization instrument to measure the vulcanization time curves of SMC materials with different types of carbon black added,as well as to test the mechanical properties of materials with different pre curing degrees.It is concluded that within a certain range,the larger the BET specific surface area of carbon black types,the shorter the shelf life,and the higher the pre curing degree,the lower their mechanical properties.

关 键 词：热固性 保质期 预固化 硫化时间 炭黑 比表面积 

分 类 号：TQ327.1[化学工程—合成树脂塑料工业]