陈辉,刘恒山,姚玉元,吕汪洋,陈文兴
CHEN Hui,LIU Hen-shan,YAO Yu-yuan,Lu WANG-yang,CHEN Wen-xing (Key Laboratory of Advanced Textile Materials and Manufacturing Techology Ministry of Education

• 1:浙江理工大学先进纺织材料与制备技术教育部重点实验室

摘要(Abstract)：

利用实验室自制的聚酰亚胺(P)I溶液,通过干湿法纺丝制得PI初生纤维。在以水和N-甲基吡咯烷酮(NMP)混合溶液(体积比8∶2)作为凝固浴,凝固浴温度为5～15℃的条件下,所得初生纤维结构均匀密实,纤维截面呈圆形或腰圆形。在对初生纤维进行热处理时,随着热处理温度升高和时间增加,PI纤维的力学性能增强。当热处理温度为300～320℃、时间为30 min时,PI纤维的力学性能最优,其断裂强度和初始模量达到2.474 cN/dtex和50.066 cN/dtex;当热处理温度高于320℃,时间超过1 h,纤维力学性能又缓慢下降。纤维的热稳定性较好,在500℃左右仍具有较好的热稳定性。
Polyimide(PI) spun fiber was produced from PI solution via dry-wet spinning.The polyimide fiber was prepared from spun fiber via heat treatment.The effects of coagulation bath was studied.The results showed that the spun fiber prepared with solutionV[H2O)/V(NMP)=8/2,5～15 ℃]as coagulation bath had a compact structure.The cross section of the fiber was round or reniform.The mechanical property of fiber was as strengthed as process temperature and process time.The effect of heat process conditions on properties of polyimide fiber was studied.The results showed that the fiber treated with temperature of 300～320 ℃ in 30 minutes exhibited best mechanical properties.The tensile strength and initial modulus of the fiber reached 2.474 cN/dtex and 50.066 cN/dtex respectively.The polyimide fiber was thermally stable at about 500 ℃.

关键词(KeyWords)： 聚酰亚胺纤维;凝固浴;热处理;力学性能
polyimide fiber,coagulation bath,thermal treatmen,mechanical property

Abstract:

Keywords:

基金项目(Foundation): 浙江省首批重点科技创新团队(2009R50013)资助

作者(Author): 陈辉,刘恒山,姚玉元,吕汪洋,陈文兴
CHEN Hui,LIU Hen-shan,YAO Yu-yuan,Lu WANG-yang,CHEN Wen-xing (Key Laboratory of Advanced Textile Materials and Manufacturing Techology Ministry of Education

DOI: 10.16090/j.cnki.hcxw.2011.10.011

参考文献(References)：

• [1]丁孟贤,何天白.聚酰亚胺新型材料[M].北京:科学出版社,1998:1-60.
• [2]张清华,丁孟贤.聚酰亚胺纤维[J].高分子通报,2001,11(5):65-72.
• [3]R N Goel,A Hepworth,B L Deopura,et al.Polyimide fibres:Struc-ture and morphology[J].Journal of Applied Polym Science,1979,23(12):3 541-3 552.
• [4]William E Dorogy,Jr Anne K ST Clair.Wet spinning of solid polyam-ic acid fibers[J].Journal of Applied Polym Science,1991,43(3):501-519.
• [5]Shahram Mehdipour-Ataei,Naeemeh Bahri-Laleh,Ahmad Amir-shaghaghi.Comparison of one-step and two-step methods of polyimidiza-tionandii substitution effect in the synthesis of new poly(ester-imide)swith bulky pendent group[J].Polymier Degradation and Stability,2006,91(11):2 622-2 631.
• [6]Stephen Z D Cheng,Zongquan Wu,Mark Eashoo,et al.A high-per-formance aromatic polyimidefibre:1.Structure,properties and mechani-cal-history dependence[J].Polymer,1991,32(10):1 803-1 810.
• [7]LI Wei-han,WU Zong-quan,et al.High-performance aromaticpolyimide fibres:Part V Compressive properties of BPDA-DMB fibre[J].Journal of Materlals Science,1996,31(16):4 423-4 431.