Introduction
Tert-Amyl peroxyneodecanoate (CAS 68299-16-1) is a peroxyester initiator characterized by the tert-amyl (2-methylbutan-2-yl) substituent. Compared to the more common tert-butyl peroxyneodecanoate, the tert-amyl variant offers slightly different decomposition kinetics and solubility characteristics that can be advantageous in specific polymerization applications.
Key Facts
- CAS Number: 68299-16-1
- Molecular Formula: C15H30O3
- Molecular Weight: 258.40 g/mol
- Appearance: Colorless to pale yellow liquid
- 10-Hour Half-Life Temperature: ~47 deg C
- SADT: ~15-20 deg C
- Storage: Refrigerated, typically below 0 deg C
Applications
PVC Production
Tert-amyl peroxyneodecanoate is employed as an initiator for PVC suspension polymerization, particularly for resin grades requiring specific molecular weight distributions. The tert-amyloxy radical generated upon decomposition may offer subtle differences in initiation efficiency and polymer end-group chemistry compared to tert-butoxy radicals from the more common tert-butyl initiators.
Acrylic and Specialty Polymers
This initiator is also applicable to acrylic resin production and specialty copolymer synthesis where its decomposition kinetics align well with the desired polymerization temperature profile.
Safety
Refrigerated storage and temperature-controlled transport are required. Standard peroxide handling protocols apply.
Q: What is the advantage of tert-amyl over tert-butyl peroxyesters?
A: The tert-amyl group provides a slightly different steric and electronic environment around the peroxide bond, which can influence decomposition rate and radical stability. In practice, the differences are subtle but may be meaningful for specific applications where small changes in initiation characteristics translate to measurable differences in polymer properties.
Key Takeaways
- Tert-Amyl peroxyneodecanoate (CAS 68299-16-1) is a medium-temperature peroxyester initiator.
- The tert-amyl substituent offers slightly different decomposition characteristics from tert-butyl analogs.
- Primary application is PVC suspension polymerization.
- Shandong Do Sender Chemicals supplies this and related peroxyester initiators.