What About The Thermal Stability And Heat Resistance Of Polypropylene Fiber?

The Thermal Stability And Heat Resistance Of Polypropylene Fiber

First, the thermal stability of polypropylene fiber
When polypropylene fiber is heated or oxidized at high temperature, it is prone to melting, decomposition, oxidation and other phenomena, resulting in a decrease in fiber performance. Therefore, the thermal stability of polypropylene fiber is an important indicator affecting its application performance.
The molecular structure and crystal structure of polypropylene fibers have a great influence on their thermal stability. Generally speaking, the methylene orientation and sequence in the molecular chain of polypropylene fiber are poor, resulting in the greater movement of its molecular chain, which is easy to melt the fiber at high temperature. At the same time, the crystal structure of polypropylene molecules also affects their thermal stability. Since the crystal structure of polypropylene fiber is looser than that of other synthetic fibers, its thermal stability is poor.
In order to improve the thermal stability of polypropylene fibers, the main method currently used is the addition of heat stabilizers. Heat stabilizers can work synergistically with the polymer and effectively inhibit its decomposition. At present, the main heat stabilizers used on the market are P, N, S and other categories, of which P heat stabilizer is a commonly used one.

Second, the heat resistance of polypropylene fiber
As a synthetic fiber, polypropylene fiber will undergo different degrees of deformation, deterioration and failure under the use conditions of high temperature environment. Therefore, the heat resistance of polypropylene fiber is also an important indicator affecting its practical application.
The heat resistance of polypropylene fiber depends on its molecular chain structure, crystal structure, intermolecular forces and other factors. Experiments have shown that as the molecular weight of polypropylene fiber molecule increases, the force between its molecular chains also increases, thereby improving its heat resistance. In addition, the random copolymerization structure and coordination of polypropylene fiber molecular chains can also affect its heat resistance.
In order to improve the heat resistance of polypropylene fiber, in addition to selecting the appropriate heat stabilizer, you can also use methods such as changing the fiber material formula and melt stretching to improve its heat resistance. In addition, if you pay attention to certain processing techniques and conditions during processing, you can also effectively improve the heat resistance of polypropylene fibers.