Solvent cast thermoplastic and thermoset rigid-rod molecular composites

被引:26
作者
Venkatasubramanian, N
Dean, DR
Dang, TD
Price, GE
Arnold, FE
机构
[1] USAF, Wright Lab, Mat Directorate, MLBP,AFRL,Polymer Branch, Wright Patterson AFB, OH 45433 USA
[2] Systran Fed Corp, Dayton, OH 45432 USA
[3] Univ Dayton, Res Inst, Dayton, OH 45469 USA
关键词
rigid-rod thermoplastic molecular composite; rigid-rod thermoset molecular composite; acid-bass interaction-mediated compatibilization;
D O I
10.1016/S0032-3861(99)00510-8
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Acid-base interaction-mediated compatibilization between rigid-rod and matrix polymer components facilitated the formation and processing of solvent cast aromatic heterocyclic rigid-rod thermoplastic as well as thermoset molecular composites above the critical concentration (C-cr) of the rigid-rod polymer in solution, without phase separation. The blends were solvent cast by the mechanism of ionic interchange between a sulfonic acid-pendent poly(p-phenylenebenzobisimidazole) (SPBI), solubilized in alcohol as its triethylammonium salt and basic thermoplastics such as poly(vinylpyridine)s or secondary or tertiary amines with thermosettable phenylethynyl, nadimide and bisbenzoxazine functionalities. Morphological characterization, utilizing SEM, WAXS and SAXS of as cast as well as annealed/thermally cured optically clear film composites of a broad range of compositions revealed homogeneous microstructures with no observable phase-separated domains, indicating high miscibility, ascribable to the favorable negative enthalpy of the ionic association between the rod-matrix components. A preliminary dynamic mechanical study of compression molded rigid-rod thermoplastic blends with relatively low rod contents showed significant enhancement in thermomechanical properties vis-a-vis the pristine matrix. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:3213 / 3226
页数:14
相关论文
共 39 条
  • [1] ARNOLD FE, 1994, ADV POLYM SCI, V117, P257
  • [2] BULK RIGID-ROD MOLECULAR COMPOSITES OF ARTICULATED ROD COPOLYMERS WITH THERMOPLASTIC PENDANTS
    BAI, SJ
    DOTRONG, M
    EVERS, RC
    [J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1992, 30 (13) : 1515 - 1525
  • [3] CHEN W, 1996, POLYM PREPR, V37, P388
  • [4] BISBENZOCYCLOBUTENE - A THERMOSET MATRIX HOST FOR RIGID-ROD MOLECULAR COMPOSITES
    CHUAH, HH
    TAN, LS
    ARNOLD, FE
    [J]. POLYMER ENGINEERING AND SCIENCE, 1989, 29 (02) : 107 - 112
  • [5] Dang T.D., 1997, POLY PREPR, V38, P301
  • [6] IONIC-CONDUCTIVITY OF CONJUGATED WATER-SOLUBLE RIGID-ROD POLYMERS
    DANG, TD
    BAI, SJ
    HEBERER, DP
    ARNOLD, FE
    SPRY, RJ
    [J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1993, 31 (13) : 1941 - 1950
  • [7] DANG TD, 1993, MATER RES SOC SYMP P, V305, P49, DOI 10.1557/PROC-305-49
  • [8] DANG TD, 1996, Patent No. 5492996
  • [9] DANG TTT, UNPUB
  • [10] Dean DR, 1997, J POLYM SCI POL CHEM, V35, P3457, DOI 10.1002/(SICI)1099-0518(19971130)35:16<3457::AID-POLA13>3.3.CO