The effect of transcrystallinity on the interfacial characteristics of polypropylene/alumina single fibre composites

被引:22
作者
Peron, B [1 ]
Lowe, A [1 ]
Baillie, C [1 ]
机构
[1] UNIV SYDNEY,DEPT MECH & MECHATRON ENGN,SYDNEY,NSW 2006,AUSTRALIA
关键词
transcrystallinity; interfacial strength; single fibre composites;
D O I
10.1016/1359-835X(96)00007-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effect of processing parameters such as crystallisation temperature and cooling rate on the crystallisation and interfacial morphology of isotactic polypropylene containing a single alumina fibre has been investigated using a hot stage microfurnace. It was found that a transcrystalline layer (TL) could only be produced if the fibre was pulled through the supercooled matrix, and that the thickness and growth rate of this TL depended upon the isothermal crystallisation temperature, but not on the cooling rate. The higher the crystallisation temperature, the slower the growth rate. Both alpha-monoclinic and beta-hexagonal crystal structures have been identified in the TL, with the beta crystals only being induced in areas of existing alpha crystals. The alpha region transforms into beta crystals except for a small region at the fibre/matrix interface. These beta crystals grow at a faster rate than the alpha crystals and were found to melt at 157 degrees C, compared to 170 degrees C for the alpha crystals. The single fibre fragmentation test was then used to characterise the interfacial adhesion in systems both with and without a TL. It was found that in systems containing a TL, the fragment lengths at saturation were related to the thickness of the TL. Additionally, when the TL was not present, the cooling rate influenced the stress transfer efficiency.
引用
收藏
页码:839 / 845
页数:7
相关论文
共 26 条
[1]   THERMOPLASTIC CARBON-FIBER COMPOSITES - CORRELATION BETWEEN INTERPHASE MORPHOLOGY AND DYNAMIC MECHANICAL-PROPERTIES [J].
CARVALHO, WS ;
BRETAS, RES .
EUROPEAN POLYMER JOURNAL, 1990, 26 (07) :817-821
[2]   THE EFFECTS OF TRANSCRYSTALLINE INTERPHASE IN ADVANCED POLYMER COMPOSITES [J].
CHEN, EJH ;
HSIAO, BS .
POLYMER ENGINEERING AND SCIENCE, 1992, 32 (04) :280-286
[3]  
DESIO GP, 1988, NOTES RES, V417
[4]  
DEVAUX E, 1990, POLYM COMMUN, V31, P391
[5]  
HATA T, 1993, 16 ANN M ADH SOC INC, P125
[6]   COMPARISON OF METHODS FOR THE MEASUREMENT OF FIBER MATRIX ADHESION IN COMPOSITES [J].
HERRERAFRANCO, PJ ;
DRZAL, LT .
COMPOSITES, 1992, 23 (01) :2-27
[7]   EFFECTS OF CRYSTALLINITY AND SUPERMOLECULAR FORMATIONS ON THE INTERFACIAL SHEAR-STRENGTH AND ADHESION IN GF PP COMPOSITES [J].
HOECKER, F ;
KARGERKOCSIS, J .
POLYMER BULLETIN, 1993, 31 (06) :707-714
[8]  
HSIAO BS, 1990, 33 IUPAC INT S MACR
[9]   THE MECHANICAL ROLE OF THE FIBER MATRIX TRANSCRYSTALLINE INTERPHASE IN CARBON-FIBER REINFORCED J-POLYMER MICROCOMPOSITES [J].
INCARDONA, S ;
MIGLIARESI, C ;
WAGNER, HD ;
GILBERT, AH ;
MAROM, G .
COMPOSITES SCIENCE AND TECHNOLOGY, 1993, 47 (01) :43-50
[10]  
KARGERKOCSIS J, 1993, COMPOS SCI TECH, V48, P191