Saturday, May 18, 2024
Home Logistics News What is the relationship between crystallinity and the properties of fiber after knots

What is the relationship between crystallinity and the properties of fiber after knots

by admin
0 comment

the higher the crystallinity, the greater the percentage of the crystallization zone in the whole fiber. Because the structure of the crystallization zone is dense, the density is large, and there are more solid connection points between molecules, the tensile strength, initial modulus, hardness, dimensional stability and density of the fiber will increase accordingly

the structure is dense, and water molecules and dye molecules are not easy to enter, resulting in the corresponding reduction of hygroscopicity, dye adsorption, moisturizing, softness and chemical activity

The crystallinity of the polymer varies from

banner

the melting point is to destroy the molecular assembly structure and form the form of molecular chain Generally, the higher the crystallinity, the more regular the molecular chain arrangement, the higher the temperature is required to destroy, so the higher the melting point is

the higher the crystallinity, the greater the percentage of the crystallization zone in the whole fiber. Because the structure of the crystallization zone is dense, the density is large, and there are more solid connection points between molecules, the tensile strength, initial modulus, hardness, dimensional stability and density of the fiber will increase accordingly, while the structure is dense, and water molecules and dye molecules are not easy to enter, resulting in hygroscopicity, dye adsorption, moisturizing Softness and chemical activity will be reduced accordingly

formation structure and performance of cotton fiber structure of cotton fiber

the structure of cotton fiber generally includes macromolecular structure, supramolecular structure and morphological structure. The first two are collectively referred to as microstructure. The characteristics of cotton fiber are basically determined by these structures. Therefore, understanding the structure of cotton fiber can provide a theoretical basis for testing the quality of cotton fiber

cotton fiber with macromolecular structure contains cellulose, pentosan, protein, fat and wax, water-soluble substances, ash and other compounds. During the growth of cotton fiber, its chemical composition changes constantly, as shown in table 1-2

most mature cotton fibers are composed of cellulose, a carbohydrate formed by the complexation of carbon dioxide and water during cotton growth. Cellulose is composed of 44.4% carbon, 6.2% hydrogen and 49.4% oxygen

supramolecular structure

supramolecular structure refers to the structure larger than the molecular range, also known as aggregated structure. Macromolecules can form multi-level supramolecular structures by molecular binding force

generally, the diameter of linear macromolecules is about 1nm, and several linear chain macromolecules are parallel to each other. They are stably combined according to the certain distance, phase and relative shape to form a very fine crystalline macromolecular beam, that is, the basic fibrils with a diameter of 1 ~ 3nm, several basic fibrils are arranged in parallel to form micro fibrils with a diameter of 4 ~ 10nm, and several micro fibrils are arranged in parallel to form a coarser macromolecular beam, That is, fibrils with a diameter of 10 ~ 30 nm

answer: the higher the crystallinity, the greater the percentage of the crystallized area in the whole fiber. Because the structure of the crystallized area is dense, the density is large, and there are more solid connection points between molecules, the tensile strength, initial modulus, hardness, dimensional stability and density of the fiber will increase accordingly, while the structure is dense, and water molecules and dye molecules are not easy to enter, resulting in hygroscopicity, dye adsorption, moisturizing Softness and chemical activity will be reduced accordingly.

You may also like

Leave a Comment

Soledad is the Best Newspaper and Magazine WordPress Theme with tons of options and demos ready to import. This theme is perfect for blogs and excellent for online stores, news, magazine or review sites.

Buy Soledad now!

Edtior's Picks

Latest Articles

u00a92022u00a0Soledad.u00a0All Right Reserved. Designed and Developed byu00a0Penci Design.