Synthesis And Properties Of Versatility Hindered Amine Light Stabilizer

Hindered amine light stabilizers (HALSs) are one of the most important thermal/light stabilizing agents of polymeric materials. They are widely available with low toxicity and low cost, and they have excellent compatibilities with a broad range of commercially significant polymeric materials. HALSs have a good photostabilizing effect on organic materials. The mechanism and application of HALSs are being as key research project by the researchers at home and abroad. They are the fastest growing and most promising new efficient light stabilizers.The main research work of this paper can be summarized as follows:1. The three series multifunctional hindered amine light stabilizers (HALSs) for monomers were designed and synthesized from cyanuric chloride, allylamine,2,2,6,6-tetramethylpiperidinol and2-(2-hydroxyphenyl)-1,2,3-benzotriazole derivatives through nucleophilic substitution. The new stabilizers were confirmed by1H NMR, FT-IR and ESI-HRMS.2. The synthesized target compounds were evaluated for their antioxidant and anti-aging properties by ultraviolet visible spectrophotometer (UV-vis), thermal gravimetric analysis (TG) and simulated light aging.This thesis has been divided into four sections. In the first part, we mainly elaborate the background of research and the mechanism of light stability effects. The second part, a series of HALSs compounds of reaction type were prepared. The structure of synthesized compounds contain s-triazine, allyl, piperidine and benzotriazole group. And properties of compounds had been studied, such as UV-vis absorption, thermal stability and light stability. Binary hindered amine light stabilizers were synthesized of the3rd chapter, and the polymer photostability was studied in this chapter. In addition, a class of free radical of HALAs was obtained by the nucleophilic substitution, and the anti-light performance of title compounds was evaluated. The results indicate that the new HALSs can considerably improve polymer photostability.