分子结构对聚酰亚胺泡沫熔体粘度和形貌的影响

玻璃钢/复合材料 ›› 2017, Vol. 0 ›› Issue (1): 36-43.

分子结构对聚酰亚胺泡沫熔体粘度和形貌的影响

胡爱军¹, 李克迪², 李姝姝¹, 杨士勇¹

1.中国科学院化学研究所,北京100190;
2.浙江中科恒泰新材料科技有限公司,绍兴312369

收稿日期:2016-05-10 出版日期:2017-01-28 发布日期:2017-01-28
作者简介:胡爱军(1966-),女,硕士,高级工程师,主要研究方向为聚酰亚胺材料,aijunhu@iccas.ac.cn。
基金资助:
863计划项目(2015AA033902)

INFLUENCE OF MOLECULAR STRUCTURE ON MELT VISCOSITY AND FEATURES OF POLYIMIDE FOAM

HU Ai-Jun¹ , LI Ke-di², LI Shu-shu¹ , YANG Shi-yong¹

1.Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China;
2.Cashem Advanced Materials Hi-tech Co., Ltd., Shaoxing 312369, China

Received:2016-05-10 Online:2017-01-28 Published:2017-01-28

摘要/Abstract

摘要： 研究了含2,3,3',4'-联苯四酸二酐(a-BPDA)的聚酰亚胺(PI)泡沫材料体系中,泡沫前驱体树脂的热处理温度、计算分子量、二酐分子结构对聚酰亚胺前驱体树脂熔体粘度和泡沫形貌的影响。研究发现,对于a-BPDA/m-PDA/NA体系,计算分子量为1500、密度为100 kg/m³时,前驱体树脂经过260 ℃/1 h的热处理得到的泡沫材料泡孔均匀、闭孔率可达89%,压缩强度为1.34 MPa,压缩模量为37.1 MPa;在该体系中,部分引入ODPA或BTDA,可降低材料制备成本,同时拥有PI泡沫原有的形貌和闭孔率。

关键词: 聚酰亚胺泡沫, 耐高温, 熔融粘度, 闭孔

Abstract: In a 2,3,3',4'-biphenyltetracarboxylic dianhydride (a-BPDA) polyimide (PI) foam system, we studied the influence of thermal treatment temperature, calculated molecular weight and dianhydride molecular structure on the melt viscosity of precursor resin and the features of foam. We found that in a-BPDA/m-PDA/NA system, we were able to make uniform foam with outstanding features when precursor resin calculated molecular weight is 1500 g/mole, foam density is 100 kg/m³ and thermal treatment is 260 ℃/1 hr. The foam has 89% closed-cell content, 1.34 MPa compression strength and 37.1 MPa compression modulus. Partially introducing ODPA or BTDA into this PI foam system can reduce the cost, and maintain those good features and closed-cell content of the foam.

Key words: polyimide foam, high temperature resistance, melt viscosity, closed-cell

中图分类号:

TB332

胡爱军, 李克迪, 李姝姝, 杨士勇. 分子结构对聚酰亚胺泡沫熔体粘度和形貌的影响[J]. 玻璃钢/复合材料, 2017, 0(1): 36-43.

HU Ai-Jun , LI Ke-di, LI Shu-shu , YANG Shi-yong. INFLUENCE OF MOLECULAR STRUCTURE ON MELT VISCOSITY AND FEATURES OF POLYIMIDE FOAM[J]. Fiber Reinforced Plastics/Composites, 2017, 0(1): 36-43.

参考文献

[1] E. David. Handbook of polymer foams[M]. United Kingdom: Rapra Technology Limited, 2004.
[2] 吴舜英, 徐敬一. 泡沫塑料成型(第二版)[M]. 北京: 北京工业出版社, 1999.
[3] 吴舜英, 马小明, 徐晓, 等. 泡沫塑料成型机理研究[J]. 材料科学与工程, 1998, 16(3): 30-33.
[4] J. H. Saunders, K. C. Frisch. Polyurethanes: Chemistry and Technology, Part 1: Chemistry[M]. New York: Robert Krieger, 1978: 250-255.
[5] S. T. Lee, N. S. Ramesh. Polymeric Foams Mechanisms and Materials[M]. Boca Raton: CRC Press LCC, 2004.
[6] C. D. Han, H. J. Yoo. Studies on structural foam processing. IV. Bubble growth during mold filling[J]. Polymer Engineering & Science, 1981, 21(9):518-533.
[7] N. S. Ramesh, D. H. Rasmussen, G. A. Campbell. Numerical and experimental studies of bubble growth during the microcellular foaming process[J]. Polymer Engineering & Science, 1991, 31(23):1657-1664.
[8] M. Ohshima, S. T. Lee. Foam Extrusion: Principles and Practice[M]. Boca Raton:CRC Press, 2000.
[9] K Taki, T Nakayama, T Yatsuzuka, et al. Visual observations of batch and continuous foaming processes [J].Cellular Plastics, 2003, 39(2):155-169.
[10] C. I. Cano, E. S. Weiser, R. B. Pipes. Solid-state polyimide foaming from powder precursors:Effect of morphology and process parameters on the diffusive phenomena[J]. Cellular Polymers, 2004, 23(5):299-309.
[11] C. I. Cano. Polyimide Microstructures From Powdered Precursors: Phenomenological and parametric studies on particle inflation[D]. The university of Akron:Akron, 2005.
[12] C. I. Cano, E. S. Weiser, T. Kyu, et al. Polyimide foams from powder:Experimental analysis of competitive diffusion phenomena[J]. Polymer, 2005, 46(22): 9296-9303.
[13] C. I. Cano, T. Kyu, R. B. Pipes. Modeling particle inflation from poly (amic acid) powdered precursors. I. Preliminary stages leading to bubble growth[J]. Polymer Engineering and Science, 2007, 47(5):560-571.
[14] C. I. Cano, M. L. Clark, T. Kyu, et al. Modeling particle inflation from poly(amic acid) powdered precursors. II. Morphological development during bubble growth[J]. Polymer Engineering and Science, 2007, 47(5):572-581.
[15] C. I. Cano, M. L. Clark, T. Kyu, et al. Modeling particle inflation from poly(amic acid) powdered precursors. III. Experimental determination of kinetic parameters[J]. Polymer Engineering and Science, 2008, 48(3):617-626.