Polyurethane elastomers with amide chain extenders of uniform length

被引:61
作者
van der Schuur, M [1 ]
Noordover, B [1 ]
Gaymans, RJ [1 ]
机构
[1] Univ Twente, NL-7500 AE Enschede, Netherlands
关键词
polyurethane; extender; thermoplastic;
D O I
10.1016/j.polymer.2005.11.074
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Toluene diisocyanate based polyurethanes with amide extenders Were synthesized poly(propylene oxide) with a number average molecular weight of 2000 and endcapped with toluene diisocyanate was used as the polyether segment. The chain extenders were based on poly (hexamethylene terephthalamide): hexamethylene diamine, bisamine-diamide and bisamine-tetra-amide. The linear poly(ether bisurethane-bisurea-amide)s (PUA) were colorless transparent thermoplastic elastomers with a high molecular weight. The polymers were analyzed by IR and DSC, the morphology studied by TEM, the mechanical properties studied by DMTA and the tensile, the elastic properties by compression and tensile set and thermal stability by melt rheology. The phase separation with these amide extenders was by crystallization. Increasing the length of the amide chain extender increased the modulus and the melting temperature of the PUA without changing the good low temperature properties. Also the elastic properties improved with amide segment length. The fracture stress increases with amide extender length. At 200 degrees C, the melt stability of the PUA with the bisaminediamide chain extender was good. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1091 / 1100
页数:10
相关论文
共 30 条
[1]  
Bayer O., 1947, MOD PLAST, V24, P250
[2]   MODEL MDI BUTANEDIOL POLYURETHANES - MOLECULAR-STRUCTURE, MORPHOLOGY, PHYSICAL AND MECHANICAL-PROPERTIES [J].
CHRISTENSON, CP ;
HARTHCOCK, MA ;
MEADOWS, MD ;
SPELL, HL ;
HOWARD, WL ;
CRESWICK, MW ;
GUERRA, RE ;
TURNER, RB .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1986, 24 (07) :1401-1439
[3]  
Dechant J., 1972, Ultrarotspektroskopische Untersuchungen an Polymeren
[4]   Structure-property relationships of flexible polyurethane foams [J].
Dounis, DV ;
Wilkes, GL .
POLYMER, 1997, 38 (11) :2819-2828
[5]  
EISENBACH CD, 1985, ADV ELASTOMER RUBBER, V51
[6]  
EISENBACH CD, 1985, POLYM PREPR-ACS, V26, P7
[7]  
FRISCH KC, 1964, HIGH POLYM 2, V16
[8]   MODULI OF CRYSTALLINE POLYMERS EMPLOYING COMPOSITE THEORY [J].
HALPIN, JC ;
KARDOS, JL .
JOURNAL OF APPLIED PHYSICS, 1972, 43 (05) :2235-&
[9]   SEGMENTED POLYURETHANS . PROPERTIES AS A FUNCTION OF SEGMENT SIZE AND DISTRIBUTION [J].
HARRELL, LL .
MACROMOLECULES, 1969, 2 (06) :607-&
[10]  
Holden G., 1996, THERMOPLASTIC ELASTO, Vsecond