Characteristics of Standard Rayon

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What contributes to the good dye absorption properties of standard rayon?

The longitudinal striated shape

The addition of liquid during coagulation

Serrated circular cross-section (correct)

The presence of zinc in the fiber

Which type of rayon has a rounder cross-section, allowing for different properties?

HWM rayon (correct)

Standard rayon

Viscose rayon

Filament rayon

What chemical property makes rayon resistant to dilute alkalis and organic solvents?

Presence of crystalline areas

Shorter molecular chains (correct)

Longitudinal striated shape

High molecular weight

What is the effect of stretching on viscose rayon after spinning?

It aligns the molecules for greater strength Signup and view all the answers

Which of the following damages rayon?

Concentrated acids Signup and view all the answers

What biological factor can destroy rayon?

Mildew Signup and view all the answers

What is the main factor responsible for the serrated circular shape of standard rayon?

Zinc oxide in the spinning bath Signup and view all the answers

What distinguishes the molecular structure of viscose rayon from that of cotton or flax?

Greater number of crystalline areas Signup and view all the answers

How does the molecular structure of HWM rayon differ from standard rayon?

More crystalline and oriented molecules Signup and view all the answers

What contributes to the bright appearance of viscose rayon?

De-lustering with titanium dioxide Signup and view all the answers

Which type of rayon has an indented shape that aids in good dye absorption?

HWM rayon Signup and view all the answers

How does the alkali cellulose and viscose rayon aging process affect the molecular structure?

Shortens the molecular chains severely Signup and view all the answers

What kind of acids damage rayon?

Hot concentrated acids Signup and view all the answers

What can destroy rayon due to biological factors?

Silverfish and mildew-producing bacteria Signup and view all the answers

What role does stretching play in enhancing the strength of viscose rayon?

Aligns molecules for greater strength Signup and view all the answers

What can cause a decrease in the brightness of viscose rayon?

Action of titanium dioxide Signup and view all the answers

Characteristics of Standard Rayon

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