Changes in Tinned Copper Braided Sleeve During Aging

1. Appearance changes
There are different types of Tinned Copper braided sleeve, and the conditions of use are different, and the changes that occur are also different.
Softening and tackiness: thermal oxidation of natural Tinned Copper Braided Sleeve, aging of chlorohydrin Tinned Copper Braided Sleeve.

Hardening and brittleness: thermal oxygen aging of butadiene Tinned Copper Braided Sleeve, aging of nitrile Tinned Copper Braided Sleeve and styrene-butadiene Tinned Copper Braided Sleeve.

Cracks: Ozone aging of unsaturated Tinned Copper Braided Sleeve, photo-oxygen aging of most Tinned Copper Braided Sleeve, but the shape of the cracks is different.
Mold and mold: biomicrobial aging of tin-plated copper Braided Sleeving.
In addition: there are spots, cracks, frosting, chalking and whitening.
2. performance change
Changes in physical and chemical properties: specific gravity, thermal conductivity, glass transition temperature, melting point, refractive index, solubility, swelling, rheology, molecular weight, molecular weight distribution; changes in heat resistance, cold resistance, breathability, water permeability, light transmission, etc. .
Changes in physical and mechanical properties: tensile strength, elongation, impact strength, bending strength, shear strength, fatigue strength, elasticity, and wear resistance are all reduced.
Changes in electrical properties: changes in electrical properties such as insulation resistance, dielectric constant, dielectric loss, and breakdown voltage, and decreased electrical insulation.
Changes in appearance and performance are caused by structural changes.
3. structural change
Cross-linking occurs between molecules, and the molecular weight increases; the appearance becomes hard and brittle.
The molecular chain is degraded (broken), the molecular weight is reduced, and the appearance becomes soft and sticky.
Other changes in the molecular structure: modification of the main chain or side chain, side group falling off and breaking of weak bonds (occurring in special Tinned Copper Braided Sleeve).