Polymer blends based on the β-modification of polypropylene

被引:86
作者
Menyhárd, A
Varga, J
Liber, A
Belina, G
机构
[1] Budapest Univ Technol & Econ, Dept Plast & Rubber Technol, H-1111 Budapest, Hungary
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
关键词
alpha- and beta-forms of isotactic polypropylene; beta-nucleating agent; calorimetry; polarised light microscopy; crystallisation; melting; polymer blends; syndiotactic polypropylene; random propylene copolymer; poly(vinylidene-fluoride); transcrystallinity;
D O I
10.1016/j.eurpolymj.2004.10.036
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
iPP/sPP, iPP/rPP, iPP/PVDF and iPP/PA-6 blends, and their beta-nucleated forms were prepared in the present study. The components of iPP/sPP and iPP/rPP blends are compatible in the molten state. The phase structure of the melt of iPP/PVDF and iPP/PA-6 blends is heterogeneous. The melting and crystallisation characteristics as well as the structure and polymorphic composition of these blends were studied by polarised light microscopy (PLM) and differential scanning calorimetry (DSC). When semicrystalline polymers are added to iPP, the most important factor of the formation a blend with beta-crystalline phase is the alpha-nucleation effect of the second polymer. In the case of polymers with an alpha-nucleating effect, the temperature range of their crystallisation should be lower than that of beta-iPP. beta-nucleated iPP/PVDF and iPP/PA-6 blends are extreme examples showing that completely beta-iPP matrix can not form even in the presence of a highly effective beta-nucleant, because of the strong alpha-nucleating ability and higher crystallisation temperature range of PVDF and PA-6. We found that the beta-crystallisation tendency of random propylene copolymers can be enhanced by adding an iPP homopolymer. (c) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:669 / 677
页数:9
相关论文
共 27 条
[1]   PRIMARY NUCLEATION AND SPHERULITE GROWTH-RATE IN ISOTACTIC POLYPROPYLENE POLYSTYRENE BLENDS [J].
BARTCZAK, Z ;
GALESKI, A ;
KRASNIKOVA, NP .
POLYMER, 1987, 28 (10) :1627-1634
[2]  
Bartczak Z., 1995, POLYPROPYLENE STRUCT, VVolume 2, P25
[3]   MELT CRYSTALLIZATION OF POLYPROPYLENE - EFFECT OF CONTACT WITH FIBER SUBSTRATES [J].
CAMPBELL, D ;
QAYYUM, MM .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1980, 18 (01) :83-93
[4]   Influence of β nucleation on the mechanical properties of isotactic polypropylene and rubber modified isotactic polypropylene [J].
Grein, C ;
Plummer, CJG ;
Kausch, HH ;
Germain, Y ;
Béguelin, P .
POLYMER, 2002, 43 (11) :3279-3293
[5]   TRANSCRYSTALLINE REGION OF POLYPROPYLENE - ITS FORMATION, STRUCTURE AND MECHANICAL-PROPERTIES [J].
HATA, T ;
OHSAKA, K ;
YAMADA, T ;
NAKAMAE, K ;
SHIBATA, N ;
MATSUMOTO, T .
JOURNAL OF ADHESION, 1994, 45 (1-4) :125-135
[6]   TRANSCRYSTALLINITY IN POLYPROPYLENE [J].
HUSON, MG ;
MCGILL, WJ .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1984, 22 (11) :3571-3580
[7]   THERMOPLASTIC FIBER REINFORCED POLYPROPYLENE COMPOSITES HAVING A TRANSCRYSTALLINE MORPHOLOGY [J].
KANTZ, MR ;
CORNELIUSSEN, RD .
JOURNAL OF POLYMER SCIENCE PART C-POLYMER LETTERS, 1973, 11 (04) :279-284
[8]  
MARTUSCELLI E, 1995, POLYPROPYLENE STRUCT, V2, P93
[9]  
Nitta K, 2003, E-POLYMERS
[10]   TRANSCRYSTALLINITY OF THIN-FILMS OF ISOTACTIC POLY(PROPYLENE) [J].
SETZ, S ;
SCHNELL, R ;
THOMANN, R ;
KRESSLER, J ;
MULHAUPT, R .
MACROMOLECULAR RAPID COMMUNICATIONS, 1995, 16 (01) :81-87