Novel aramid polymer
By adopting a new aramid polymer with a planar structure formed by para-phenylenediamine-2,5-acyl chloride polycondensation, the existing aramid polymer has solved the room for improvement in insulation performance, and the significant improvement in insulation performance of thin-sheet products has been achieved.
Patent Information
- Application Number
- CN202510191463.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-05-06
AI Technical Summary
There is room for improvement in the insulation performance of existing aramid polymers, especially in flake-like products.
A new aramid polymer with specific repeating units is used, which is made of polycondensation of paraphenylenediamine-2,5-acyl chloride to form a planar structure and significantly improves insulation properties.
Through the planar structure design of the new aramid polymer, the insulation performance of the sheet-like products is significantly improved.
Smart Images
Figure CN119931024A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of aramid fibers, in particular to a novel aramid polymer. Background Art
[0002] Aramid, with its exceptional properties of ultra-high strength, high modulus, high-temperature resistance, acid and alkali resistance, lightweight, insulation, aging resistance, and long lifespan, is widely used in composite materials, bulletproof products, building materials, special protective clothing, and electronic equipment. Currently, the most widely used varieties are aramid 1313 and aramid 1414. The molecular chains of aramid 1313 are zigzag, while those of aramid 1414 are linear, with the molecules of both arranged in a chain-like pattern. This application provides a novel aramid polymer with planar molecular arrangement. Summary of the Invention
[0003] The purpose of the present invention is to provide a novel aramid polymer with planar molecular arrangement.
[0004] The technical solution adopted by the present invention is: a new aramid polymer comprises repeating units having the following formula (I):
[0005]
[0006] To further optimize the technical solution, the novel aramid polymer is prepared by polycondensation of p-phenylenediamine-2,5-chloride.
[0007] Compared with the prior art, the present invention has the following advantages: the aramid polymer of the present invention has a planar structure, and the sheet-like product made therefrom can significantly improve the insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is the molecular formula of p-phenylenediamine-2,5-chloride. DETAILED DESCRIPTION
[0009] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.
[0010] Specific embodiment: The novel aramid polymer comprises repeating units having the following formula (I):
[0011]
[0012] The 1st, 2nd, 4th and 5th positions on each benzene ring are connected to the adjacent benzene rings through -CO-NH- (or -NH-CO-) bonds, forming a planar structure (or a network structure). The thin sheet products made from it can significantly improve the insulation performance.
[0013] Specifically, the novel aramid polymer is prepared by polycondensation of p-phenylenediamine-2,5-diamine chloride, and its molecular formula is as follows: Figure 1 As shown in [1], p-phenylenediamine-2,5-chloride is dissolved in N,N-dimethylacetamide (an acid binder may be added later), the temperature is gradually increased until the reaction is complete, and calcium hydroxide is added. The resulting mixture is then washed multiple times with water, filtered, and dried to obtain the novel aramid polymer. For each p-phenylenediamine-2,5-chloride molecule, its two amine groups undergo condensation polymerization with the acyl chloride groups of two different p-phenylenediamine-2,5-chloride molecules, and its two acyl chloride groups undergo condensation polymerization with the amine groups of two other different p-phenylenediamine-2,5-chloride molecules.
[0014] It should be understood that the above-described specific embodiments of the present invention are merely illustrative or illustrative of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the scope of protection of the present invention. In addition, the appended claims are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.
Claims
1. A novel aramid polymer comprising repeating units of the following formula (I):
2. The novel aramid polymer according to claim 1, characterized in that: It is prepared by polycondensation of p-phenylenediamine-2,5-chloride.