Metallocene polyolefins and their blends

被引：0
作者：
Hess, M
Lopez, BL
Gartner, C
机构：
[1] Univ Antioquia, Dept Quim, Medellin, Colombia
[2] Univ Duisburg Gesamthsch, Dept Phys Chem, D-47048 Duisburg, Germany
来源：
MACROMOLECULAR SYMPOSIA | 2001年 / 174卷
关键词：
D O I：
10.1002/1521-3900(200109)174:1<277::AID-MASY277>3.0.CO;2-4
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Commercial copolymers of 1-octene and ethylene: metallocene catalyzed (mLLDPE) and Ziegler-Natta catalyzed (znLLDPE), a low density polyethylene (LDPE), and high density polyethylene (HDPE), were characterized with respect to branching, crystallization behaviour and dynamic-mechanical properties. It was found that the crystallinity of the polymers is more influenced by the homogeneity of the short-chain branching than by its content. The study of blends of mLLDPE and znLLDPE with LDPE and HDPE showed that the interaction between mLLDPE and LDPE is stronger than between znLLDPE and LDPE. Blends containing mLLDPE showed a composition depending improvement of the storage modulus G' which was not observed in znLLDPE/LDPE blends. The HPDE blends followed a linear mixing rule. Co-crystallization was found mLLDPE/LDPE and partially in znLLDPE/LDPE and znLLDPE/HDPE blends, respectively.
引用
收藏
页码：277 / 294
页数：18
相关论文
共 21 条
[1]   TEMPERATURE-DEPENDENT CRYSTALLINE-AMORPHOUS STRUCTURES IN LINEAR POLYETHYLENE - SURFACE MELTING AND THE THICKNESS OF THE AMORPHOUS LAYERS [J].
ALBRECHT, T ;
STROBL, G .
MACROMOLECULES, 1995, 28 (17) :5827-5833
[2]   RELAXATION PROCESSES IN CRYSTALLINE POLYMERS - MOLECULAR INTERPRETATION - A REVIEW [J].
BOYD, RH .
POLYMER, 1985, 26 (08) :1123-1133
[3]   EFFECT OF ETHOXYSILANE AND METHOXYSILANE DONORS IN PROPENE 1-HEXENE COPOLYMERIZATION WITH HIGH-YIELD SUPPORTED ZIEGLER-NATTA CATALYSTS [J].
FAN, ZQ ;
FORLINI, F ;
TRITTO, I ;
LOCATELLI, P ;
SACCHI, MC .
MACROMOLECULAR CHEMISTRY AND PHYSICS, 1994, 195 (12) :3889-3899
[4]   Nuclear magnetic resonance detection of two distinctly different chains in the orthorhombic crystalline phase of polyethylenes [J].
Hillebrand, L ;
Schmidt, A ;
Bolz, A ;
Hess, M ;
Veeman, W ;
Meier, RJ ;
van der Velden, G .
MACROMOLECULES, 1998, 31 (15) :5010-5021
[5]   MELTING PROCESS AND EQUILIBRIUM MELTING TEMPERATURE OF POLYCHLOROTRIFLUOROETHYLENE [J].
HOFFMAN, JD ;
WEEKS, JJ .
JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS SECTION A-PHYSICS AND CHEMISTRY, 1962, 66 (JAN-F) :13-+
[6]   CHARACTERIZATION AND PROPERTIES OF POLYETHYLENE BLENDS .1. LINEAR LOW-DENSITY POLYETHYLENE WITH HIGH-DENSITY POLYETHYLENE [J].
HU, SR ;
KYU, T ;
STEIN, RS .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1987, 25 (01) :71-87
[7]   MECHANICAL RELAXATION AND STRUCTURE OF PARTLY CRYSTALLINE POLYMERS [J].
ILLERS, KH .
KOLLOID-ZEITSCHRIFT AND ZEITSCHRIFT FUR POLYMERE, 1969, 231 (1-2) :622-&
[8]  
ILLERS KH, 1963, J COLL SCI, V18, P839
[9]  
KAMINSKY W, 1983, MAKROMOL CHEM-RAPID, V4, P417
[10]   FULLY-AUTOMATIC TORSIONAL PENDULUM FOR TEMPERATURE-RANGE FROM -180-DEGREES-C TO +250-DEGREES-C [J].
KOSFELD, R ;
MANSFELD, J ;
SCHAFER, S ;
SCHULZ, E .
RHEOLOGICA ACTA, 1979, 18 (05) :576-584
123