Polyurethanes with Narrow- and Polydisperse Hard Segment Distributions

被引：7

作者：

De, Debasish ^{[1
,2
]}

Gaymans, Reinoud J. ^{[1
]}

机构：

[1] Univ Twente, NL-7500 AE Enschede, Netherlands

[2] Dutch Polymer Inst, NL-5600 AX Eindhoven, Netherlands

来源：

MACROMOLECULAR MATERIALS AND ENGINEERING | 2008年 / 293卷 / 11期

关键词：

dispersity; poly(propylene oxide); polyurethane; thermoplastic;

D O I：

10.1002/mame.200800147

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polyurethanes with narrow-disperse (ND) and polydisperse (PD) hard segment (HS) distributions were prepared in a two-step process. First, a poly(propylene oxide) end-capped with MDI (4,4'methylenebis(phenyl isocyanate) was synthesized. To this prepolymer either a diamine-diamide was added to form ND HSs or a mixture of a diamine-diamide and additional MDI to form PD HSs in the copolymers. The polyurethanes displayed a ribbon-like crystalline morphology, and it was found that the copolymers with ND HSs were more crystalline, had a higher modulus, a less temperature-dependant modulus, and a higher melting temperature than their PD counterparts. Overall, the polyurethanes with the narrow-dispersed HSs displayed superior properties.

引用

页码：887 / 894

页数：8

共 19 条

[1] Polyurethanes with monodisperse rigid segments based on a diamine-diamide chain extender [J].

Biemond, G. J. E. ;

Braspenning, K. ;

Gaymans, R. J. .

JOURNAL OF APPLIED POLYMER SCIENCE, 2008, 107 (04) :2180-2189

[2] Effect of symmetry and H-bond strength of hard segments on the structure-property relationships of segmented, nonchain extended polyurethanes and polyureas [J].

Das, Sudipto ;

Cox, David F. ;

Wilkes, Garth L. ;

Klinedinst, Derek B. ;

Yilgor, Iskender ;

Yilgor, Emel ;

Beyer, Frederick L. .

JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS, 2007, 46 (05) :853-875

[3]

Eisenbach C. D., 1986, ADV ELASTOMERS RUBBE, P51, DOI 10.1007/978-1-4757-1436-4_4

[4]

EISENBACH CD, 1989, MULTIPHASE MOL SYSTE, V6, P339

[5]

FU B, 1986, RUBBER CHEM TECHNOL, V59, P896

[6] Microdomain morphology of poly(urethane urea) multiblock copolymers [J].

Garrett, JT ;

Siedlecki, CA ;

Runt, J .

MACROMOLECULES, 2001, 34 (20) :7066-7070

[7] SEGMENTED POLYURETHANS . PROPERTIES AS A FUNCTION OF SEGMENT SIZE AND DISTRIBUTION [J].

HARRELL, LL .

MACROMOLECULES, 1969, 2 (06) :607-&

[8]

Kim HD, 1999, J APPL POLYM SCI, V73, P345, DOI 10.1002/(SICI)1097-4628(19990718)73:3<345::AID-APP5>3.0.CO

[9]

2-T

[10] Synthesis and characterisation of uniform bisester tetra-amide segments [J].

Krijgsman, J ;

Husken, D ;

Gaymans, RJ .

POLYMER, 2003, 44 (23) :7043-7053

← 1 2 →