Cotton fabric has been crosslinked with differing molecular chain lengths of an aldehyde crosslinking agent (formaldehyde and glutaraldehyde). The formaldehyde treated fabric shows lower tensile strength retention than the glutaraldehyde treated fabric but higher elongation retention for a given agent concentration. At the same dry or wet crease recovery angle, tensile strength of the formaldehyde treated fabric is lower than that of the glutaraldehyde treated fabric, but elongation is higher. Wet crease recovery of the formaldehyde treated fabric is better than that of the glutaraldehyde treated fabric. The degree of surface migration is similar for both fabrics. Agent distribution in the treated fibers is different for the differing molecular chain lengths of the crosslinking agents.

The DIC method is applied to measure the mechanical properties of the Phenolic resion foam material. Porosity foam material is a good heat insulation material. The Phenolic resin foam material has low flammability, low smoke and low toxicity. It has been extensively applied in many public safety related industries and products. But, the mechanical behavior of Phenolic resin foam material is brittleness, tensile strength is low and adhesion force is not good. Therefore, this material is used as bare filler or boarded as sandwich material for outer wall or roof of building. The mechanical properties of these kind materials should be known about under consideration for installing safety and economic effects. The bare material of Phenolic resin foam material is used to test the tensile strength, compressive strength and bending strength s used to measure the strain field to ensure the difference between this material and traditional construction materials. The results show that the digital image correlation method can be successfully applied to measure the mechanical properties of Phenolic resin foam material.