108-83-8 Purity
97%+
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Specification
A study explored the effect of Lewis base (σ complex) amine ether-type and ether-type polar modifiers on the microstructure of anionically polymerized polybutadiene. The strongest and comparable influence on 1,2 butadiene isomeric structure formation was provided by DMEAEE > DTP > THF-DEA. In this work, 2-Methyl-4,6-bis(octylsulfanylmethyl)phenol (Irganox 1520) was used as an antioxidant.
Polymerization of polybutadiene
· Three amine-ethers, DMEAEE, THF-DEA, and DMDEE, along with two ethers, ETE and DTP, were utilized as polar modifiers in the anionic polymerization of 1,3-butadiene.
· The impact of varying polar modifier concentrations in nonpolar solvents on polybutadiene microstructure was investigated through anionic polymerizations carried out in individual glass bottles using a custom bottle polymerizer.
· All reactions were conducted for 2 hours at a constant temperature of 70°C to ensure consistency in polybutadiene microstructure. Following the reaction, it was stopped with 0.5 mL of 2-propanol and an antioxidant (Irganox 1520) was added.
· The polymer solutions were then left overnight under a fume hood for solvent evaporation and subsequently dried in a vacuum dryer at 65°C and 10 mbar for the next 12 hours.
Polyisoprene (PI) can be prepared by batch seed-free emulsion polymerization of isoprene using n-dodecyl mercaptan as a chain transfer agent (CTA). In this work, three batch emulsion polymerizations of Is at 10 C were carried out, and a global polymerization model was adjusted to measurements of monomer conversion, particle diameter, and average molecular weights. During the synthesis process, 4,6-bis (octylthiomethyl)-o-cresol is used as an antioxidant to avoid latex degradation.
Polymerizations and characterization
· Initially, the emulsifier and 390 g of water were placed in the reactor. The temperature was then set to 10 °C, following which the monomer, CTA, and initiator were added, and the mixture was stirred for 30 min with continuous N2 bubbling. Polymerization began when a water solution of FeSO4.7H2O, SFS, and EDTA was introduced.
· Each latex sample was divided into three fractions. The first fraction was dried at 80 °C until a constant weight was achieved to measure conversion. The second fraction was diluted with water for particle size measurement. The third fraction underwent SEC characterization as follows: (a) an antioxidant [4,6-bis (octylthiomethyl)-o-cresol] was added to the latex to prevent degradation; (b) the latex was precipitated in isopropanol; and (c) the precipitate was filtered, dried under vacuum, and stored in the dark at 15 °C for analysis.
A new type of antioxidant
2-Methyl-4,6-bis(octylsulfanylmethyl)phenol is used in synthetic rubber, which has excellent antioxidant effect and its dosage is very small.
2-Methyl-4,6-bis(octylsulfanylmethyl)phenol is a white to light yellow oily liquid or crystal.
2-Methyl-4,6-bis(octylsulfanylmethyl)phenol is an environment-friendly antioxidant, which can be used to prepare rubber materials and improve the stability of materials.
2-Methyl-4,6-bis(octylsulfanylmethyl)phenol is an organic raw material of phenolic alcohols and their halogenated, sulfonated, nitrated or nitrosated derivatives.
The melting point of 2-methyl-4,6-bis(octylsulfanylmethyl)phenol is 14.2℃.
2-Methyl-4,6-bis(octylsulfanylmethyl)phenol can be dissolved in chloroform and methanol solvents.
The molecular formula of 2-methyl-4,6-bis(octylsulfanylmethyl)phenol is C25H44OS2.
The molecular weight of 2-methyl-4,6-bis(octylsulfanylmethyl)phenol is 424.75g/mol.
2-Methyl-4,6-bis(octylsulfanylmethyl)phenol needs to be stored at low temperature.
2-Methyl-4,6-bis(octylsulfanylmethyl)phenol is a new high molecular weight liquid antioxidant, which can improve the stability of plastics and realize the transformation of rubber products from universal to green.
The specific gravity of 2-methyl-4,6-bis(octylsulfanylmethyl)phenol is 0.980 g/ml at 20℃.