Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Polyol Molecular Weight Distribution Effect on Mechanical and Dynamic Properties of Polyurethanes

5 Polyol Molecular Weight Distribution Effect on Mechanical and Dynamic Properties of Polyurethanes [Pg.449]

1 TDI Prepolymers Cured with Methylene Bi5-(2-Chloroaniline) [MBOCA] [Pg.450]

In formulating polyurethane/urea systems using ultra-low monol PPG polyols, it was found that polyol MWD has a major effect on polymer properties. A broadened MWD is required to achieve a property profile similar to a PTMEG-based system. The MW-distribution effect is illustrated using TDI prepolymers cured with MBOCA, TDI moisture-cured prepolymers and aqueous polyurethane/urea dispersion coatings. [Pg.450]

Traditionally, high-performance TDI/MBOCA-cured elastomers are based on PTMEG. They are prepared by reacting TDI with PTMEG at a 1.7 1 to 2 1 NCO to OH ratio to form a prepolymer and then extend the polymer chain with MBOCA. For these studies, prepolymers were prepared using pure 2,4-TDI reacted with polyol at a 2 1 NCO to OH ratio. [Pg.450]

The properties of a MBOCA-extended prepolymer based on a 1000-MW PPG compared to a 1000-MW PTMEG are shown in columns 1 and 2 of Table 9.16. Surprisingly, the [Pg.450]




SEARCH



And molecular mechanics

And molecular mechanism

Distribution mechanisms

Distribution of molecular weight

Distribution weight

Dynamic distribution

Dynamic mechanical propertie

Dynamic mechanical properties

Dynamic mechanisms

Dynamic properties

Dynamical Mechanical Properties

Dynamical effects

Dynamical mechanical

Dynamics effect

Dynamics of distribution

Effect on mechanical properties

Effect on molecular weight

Effective molecular weight

Effects of molecular weight

Mechanical and Dynamic Properties

Mechanical properties molecular weight

Mechanical properties molecular weight effect

Mechanical properties weight

Molecular distribution

Molecular dynamics mechanisms

Molecular mechanics and dynamics

Molecular properties’ effect

Molecular weight and

Molecular weight distribution

Molecular weight distribution properties

Molecular weight effect

Of polyurethanes

On mechanical properties

Polyols molecular weight, effect

Polyurethane dynamic mechanical properties

Polyurethanes Dynamic properties

Polyurethanes mechanical

Properties distributions

Properties molecular weight

Properties of polyurethane

Property molecular weight effect

Weight-property

Weighted Properties

© 2024 chempedia.info