Polyurethane Elastomer Chemistry

Hepburn, C.

doi:10.1007/978-94-011-2924-4_2

Cited by 33 publications

(44 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, polyurethanes are an important class of thermotroplastic elastomers with many applications, such as coating, binder resins, fibers, and high-performance elastomeric products [5,6]. Thermoplastic polyurethane elastomers have been investigated for several years.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of new liquid crystalline polyurethanes containing mesogenic side chain

Bagheri

Pourmoazzen

2008

Reactive and Functional Polymers

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of new liquid crystalline polyurethanes containing mesogenic side chain

Bagheri

Pourmoazzen

2008

Reactive and Functional Polymers

View full text Add to dashboard Cite

“…In the MPT samples, however, the tensile strength decreased with increasing hard-segment content, due to the strength orientation of the soft segment during the extension process. 9 Figure 8 represents the stress-strain hysteresis curves of the compression-molded sheet samples of MPP1, MPT1 and MPP2, MPT2 for various maximum elongations (%). The permanent set (%) of these samples with various maximum elongations are shown in Figure 9.…”

Section: Resultsmentioning

confidence: 99%

Preparation and properties of segmented thermoplastic polyurethane elastomers with two different soft segments

Kim

Lee

Huh

et al. 1999

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

Thermoplastic polyurethane elastomers were prepared from 4,4-diphenylmethane diisocyanate (MDI)/1,4-butanediol (BD)/poly(propylene glycol) (PPG) and MDI/BD/poly(oxytetramethylene glycol) (PTMG). The MDI/BD-based hard-segment content of polyurethane prepared in this study was of 39 -65 wt %. These polyurethane elastomers had a constant soft-segment molecular weight (M n , 2000), but a variable hard-segment block length (n, 3.0 -10.1; M n , 1020 -3434). The effects of the hardsegment content on the thermal properties and elastic behavior were investigated. These properties of the PPG-based MPP samples and the PTMG-based MPT samples were compared. The polyurethane prepared in this study had a hard-segment crystalline melting temperature in the range of 185.5-236.5°C. With increasing hard-segment content, the dynamic storage modulus and glass transition temperature increased in both the MPP and MPT samples. The permanent set (%) increased with increasing hard-segment content and successive maximum elongation. The permanent set (%) of the MPP samples was higher than that of MPT samples at the same hard-segment content. The value of K (area of the hydrogen-bonded carbonyl group/area of the free carbonyl group) increased with increasing hard-segment content in both the MPP and MPT samples, and the K value of the MPT samples was higher than that of the MPP samples at the same hard-segment content.

show abstract

“…1). 6 This indicated that the hydroxyl group of the n-butanol had reacted with literature. [10][11][12][13][14][15] The epoxy compound was kept in carbamate) was found to combine with the cataa vacuum at 60ЊC for about 12 h in order to remove lyst BDMA to form a 1 : 1 complex, which catagas or moisture in the epoxy.…”

Section: Methodsmentioning

confidence: 99%

Kinetics of curing reaction of urethane function on base-catalyzed epoxy reaction

Han

Chern

Hsieh

et al. 1998

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

ABSTRACT:The kinetic study on the effect of aromatic-connected carbamate (Ar-carbamate) on the curing reaction of phenyl glycidyl ether (PGE) catalyzed by tertiary amine was carried out through thermal analysis of the reaction by differential scanning calorimetry (DSC). By isothermal DSC analysis, the consumption rate of the epoxide group of PGE was found to be a first-order reaction in the presence of aromatic-connected carbamate in the reaction. It was found that the reaction system has a low activation energy ( E a Å 4.63 kcal/mol) as compared to the system without Ar-carbamate (E a Å 6.89 kcal/mol). A reaction mechanism was proposed for this reaction system.

show abstract

Polyurethane Elastomer Chemistry

Cited by 33 publications

References 0 publications

Synthesis and properties of new liquid crystalline polyurethanes containing mesogenic side chain

Synthesis and properties of new liquid crystalline polyurethanes containing mesogenic side chain

Preparation and properties of segmented thermoplastic polyurethane elastomers with two different soft segments

Kinetics of curing reaction of urethane function on base-catalyzed epoxy reaction

Contact Info

Product

Resources

About