Question

Discussions: Please kindly answer the following child questions AS IN DETAILS AS POSSIBLE.

3) Discuss the effect of water on the fiber molecules. Specifically, discuss the effect of water on the ironing temperature. Discuss the effect of water on the degree of wrinkle when you shake the clothes (by comparing when you shake the cloth without using water).

4) Draw the effect of water on the motions of polymer chains (including chewing gum).

Answer 1

Question 3.

Effect of water on the fiber molecules: The effect of water absorption on the mechanical properties of flax reinforced bio epoxy composites has been studied by the immersion of the samples in water at room temperature. It shows that water absorption increases with an increase in fiber weight fraction due to higher cellulose content.

Effect of water on the ironing temperature: Ironing is the use of a machine, usually a heated tool (an iron), to remove wrinkles from fabric. The heating is commonly done to a temperature of 180-220 °C, depending on the fabric. Ironing works by loosening the bonds between the long-chain polymer molecules in the fibers of the material. While the molecules are hot, the fibers are straightened by the weight of the iron, and they hold their new shape as they cool. Some fabrics, such as cotton, require the addition of water to loosen the intermolecular bonds.