Phase Morphology and Mechanical Properties of Aliphatic Waterborne Polyurethane-ureas: Effect of 1,6-hexamethylene Diisocyanate (HDI)/Isophorone Diisocyanate (IPDI) Ratio

被引：8

作者：

Fu, Heqing ^{[1
]}

Liu, Kang ^{[1
]}

Yan, Caibin ^{[1
]}

Chen, Weifeng ^{[1
]}

Wang, Yin ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

POLYMERS & POLYMER COMPOSITES | 2015年 / 23卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Waterborne polyurethane-ureas; Phase morphology; Mechanical Properties; HDI/IPDI ratio; IN-VITRO DEGRADATION; CHAIN EXTENDERS; COPOLYMERS; SEGMENT; ELASTOMERS; BEHAVIOR; DISPERSIONS; ADHESIVES; COATINGS; HTPB;

D O I：

10.1177/096739111502300304

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Aliphatic waterborne polyurethane-ureas (WPUU) were prepared using 1,6-hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI) as mixed diisocyanates. The effects of the HDI/IPDI ratio on the phase morphology of WPUU films including the hydrogen bonding, crystallization of the soft segment and hard segment, and phase separation were investigated. The relationship between the phase morphology and the mechanical properties was also studied. The FTIR spectrum showed that the hydrogen bonding degree in the hard segments increased as the HDI/IPDI ratio increased. XRD analysis revealed the excellent crystallinity of WPUU films. DSC analysis indicated that the degree of phase separation was improved with increasing HDI/IPDI ratio, and DMA analysis showed that the storage modulus of the WPUU film increased at first and then decreased. When the HDI/IPDI ratio was 4:1, the WPUU films exhibited high tensile strength.

引用

页码：141 / 150

页数：10

共 5 条

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Scortanu, E
Prisacariu, C
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HIGH PERFORMANCE POLYMERS, 2006, 18 (02) : 127 - 143
[2] Solid state strucuture, oxygen barrier and mechanical properties of polyhydroxylated dendritic polymers cross-linked with 1,6-hexamethylene diisocyanate.
Nazarenko, S
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ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2004, 228 : U432 - U432
[3] Polyurethane composites based on oil palm empty fruit bunches: Effect of Isocyanate/Hydroxyl ratio and chemical modification of empty fruit bunches with toluene diisocyanate and hexamethylene diisocyanate on mechanical properties
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[4] The influence of the NCO/OH ratio and the 1,6-hexanediol/dimethylol propionic acid molar ratio on the properties of waterborne polyurethane dispersions based on 1,5-pentamethylene diisocyanate
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FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING, 2019, 13 (01) : 80 - 89
[5] The influence of the NCO/OH ratio and the 1,6-hexanediol/dimethylol propionic acid molar ratio on the properties of waterborne polyurethane dispersions based on 1,5-pentamethylene diisocyanate
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Frontiers of Chemical Science and Engineering, 2019, 13 : 80 - 89

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