クイックアンサー
Dimyristyl peroxydicarbonate (CAS 53220-22-7) is a peroxydicarbonate initiator with C14 (myristyl/tetradecyl) alkyl substituents. The medium-chain length provides a balance of solubility characteristics, handling properties, and decomposition kinetics that can be advantageous for specific PVC polymerization processes.
Introduction
Dimyristyl peroxydicarbonate (CAS 53220-22-7) is a peroxydicarbonate initiator with C14 (myristyl/tetradecyl) alkyl substituents. The medium-chain length provides a balance of solubility characteristics, handling properties, and decomposition kinetics that can be advantageous for specific PVC polymerization processes.
Key Facts
- CAS Number: 53220-22-7
- Molecular Formula: C30H58O6
- Molecular Weight: 514.79 g/mol
- Appearance: White to off-white waxy solid
- Active Oxygen: ~3.1% (theoretical)
- 10-Hour Half-Life Temperature: ~44-48 deg C
- Storage: Deep refrigerated, typically -15 to -20 deg C
Applications
PVC Polymerization
The C14 alkyl chain length provides specific solubility and partitioning behavior in VCM/water/PVC systems. This can influence initiator distribution, polymerization kinetics, and final particle morphology. The initiator is often used in combination with other peroxides for optimized polymerization rate profiles.
Specialty Polymer Systems
The medium-chain peroxydicarbonates can also find application in specialty vinyl copolymer and acrylic polymer systems where their specific decomposition kinetics and solubility properties match process requirements.
Safety and Handling
Standard peroxydicarbonate safety protocols apply: deep refrigerated storage, strict temperature monitoring, explosion-proof equipment, and comprehensive emergency planning. The waxy solid physical form requires precautions against dust generation during handling.
Frequently Asked Questions
Q: Why would one choose a C14 peroxydicarbonate over the more common C8 (EHP) initiator?
A: The different alkyl chain length influences solubility, partitioning, and volatility. In certain PVC processes, the C14 initiator may provide more favorable distribution between monomer and polymer phases, affecting particle formation and morphology. Additionally, the higher molecular weight and lower volatility can be advantageous for processes operating at higher temperatures or where initiator volatility is a concern.
Key Takeaways
- Dimyristyl peroxydicarbonate (CAS 53220-22-7) is a C14 chain peroxydicarbonate initiator.
- It offers intermediate solubility and partitioning characteristics between short-chain and long-chain peroxydicarbonates.
- Deep refrigerated storage is required for safe handling.
- Shandong Do Sender Chemicals supplies this specialty initiator for specific PVC applications.