Preparation method of nano carboxy styrene-butadiene rubber toughened nylon

Abstract

The nano-level carboxylic styrene-butadiene latex is uniformly dispersed in polyamide monomer of caprolactam, etc. to form a microemulsion system with thermodynamic stability, isotropy, transparent of semi-transparent appearance and grain size of 1nm-100nm, then they are melt-polymerized so as to obtain organic nano nylon. As compared with general nylon said invented nano-level carboxylic styrene-butadiene latex toughened nylon possesses higher notched impact strength.

Description

technical field [0001] The invention relates to a preparation method of nanoscale carboxylated styrene-butadiene rubber toughened nylon Background technique [0002] Nanocomposites (Nanocomposites) refer to materials in which at least one of the two-phase (or multi-phase) microstructures has a one-dimensional size of nanoscale (1-100nm). Due to the quantum effect and surface effect produced by the large specific surface area of ​​the nano-dispersed phase and the strong interfacial interaction, the nano-material not only exhibits properties different from general macro-composite materials, but may also have special properties that the original components do not have. It adds new avenues for polymer modification and preparation of high-performance, multifunctional materials. Since the 1990s, the research on nanocomposite materials has been widely carried out in the world, and it has become a new research field facing the 21st century. [0003] Abroad, the research on polymer...

AI Technical Summary

Problems solved by technology

These preparation methods all adopt the composite blending of polymers and polymers, which have the following disadvantages: (1) the physical and chemical properties of the polymers are easily changed after two times of processing, and the product quality is unstable; Mixed process, long production process, high product manufacturing cost

(3) Problems such as complicated process and difficult industrialization

[0004] In China, the research on organic nanocomposites started relatively late. At present, Sinopec Beijing Research Institute of Chemical Industry has prepared nano-scale carboxylated styrene-butadiene rubber toughened nylon by melt blending technology, but this method has the following shortcomings: (1) The proportion of nano-scale carboxylated styrene-butadiene rubber added is relatively large, and the proportion of nano-scale carboxylated styrene-butadiene rubber reaches 30%, and the composite material cost is high; (2) the screw extrusion process is increased, and the manufacturing cost increases; (3) due to Nano-scale carboxylated styrene-butadiene rubber has a nano-scale particle size and is a flammable product. When it is mixed with nylon chips in a dry state, it is easy to diffuse into the air, which will increase the risk of fire at the production site, and at the same time, the dust will also endanger the health of production workers. Healthy; (4) The product quality is unstable; (5) Although the toughness is good, other physical and mechanical properties have dropped significantly