PAN纤维饱和蒸气牵伸传热机理  

Mechanism of heat transfer of PAN fiber drawn in saturated steam

作　　者：王华[1] 赵晓莉[1] 韩笑[1] 王增加[1] 彭卫东[1] 

机构地区：[1]西安航天复合材料研究所西安康本材料有限公司,高性能碳纤维制造及应用国家地方联合工程研究中心,西安710089

出　　处：《化工新型材料》2013年第12期127-130,共4页New Chemical Materials

摘　　要：依据热力学理论对PAN纤维在蒸汽牵伸箱中的传热机理进行了分析。结合实验数据和传热学公式得出：蒸汽牵伸箱内热量主要通过对流传递到纤维表面，再通过热传导传递到纤维的内部，热传导是纤维热量传递的控制步骤。纤维进入蒸汽牵伸箱的起始温度和蒸气温度越高，纤维直径越细，纤维中心温度升温到玻璃化温度的时间越短。但起始温度不能高于纤维的玻璃化转变温度。在400-430K的温度范围内，提高蒸气温度能较为明显的缩短纤维中心加热到玻璃化温度所用时间。Depended on thermodynamic theory,the heat transfer mechanism of polyaerylonitrile fiber in the saturat- ed steam drawing box was analysed. Combined the trail data and thermodynamic equation, the conclusion can be got： the heat mainly through convection came to the fiber surface, then came to the fiber inner through conduction in the saturated steam drawing box, heat conduction was the key step in the fiber heat transfer. Higher initiative temperature and steam temperature, thiner diameter were help to reduce the time of fiber center temperature to reach glass transition temperature, but the initiative temperature can＇t be highter than glass transition temperature. With steam temperature increased, the time required for fiber center temperature rising to glass transition can be obviously reduced in the ranee af 400-430K

关 键 词：PAN纤维 饱和蒸气牵伸 传热机理 

分 类 号：TQ342.3[化学工程—化纤工业]