VA-057
CAS : 1400693-47-1
Plastics manufacturing
Photocurable
VA-057 is a water-soluble azo polymerization initiator which has a zwitterinoic structure. The 10-hour half-life temperature is 57 ºC, which allows a polymerization under a mild condition. As a non-halogenated initiator, VA-057 is uniquely characterized by not causing any concerns about coloring of polymer or corrosion of polymerization facilities with halogen. Since the product has a zwitterionic structure, formation of both cationic and anionic latex is expected.
- Potential for introducing carboxyl group into terminal of polymer
- Zwitterionic structure
- Can be used in a wide pH range(pH3～9)
- 10 Hour half-life decomposition temperature: 57℃
![structural formula of 2,2'-Azobis[N-(2-carboxyethyl)-2-methylpropionamidine]tetrahydrate](image/VA-057.png)
| Chemical name | 2,2'-Azobis[N-(2-carboxyethyl)-2-methylpropionamidine]tetrahydrate |
|---|---|
| CAS RN® | 1400693-47-1 |
| Molecular weight | 414.46 |
| Molecular formula | C14H34N6O8 |
Physical characteristics
| Color Appearance |
white - pale yellow powder - crystalline powder |
|---|---|
| Melting point/freezing point | 97(dec.) °C |
| 10hour half-life decomposition temperature | 57℃（in water） |
| Activation energy | 122.7 kJ/mol |
| Frequency factor (ln A) | 33.88 |
| Solubilities | water, methanol : freely soluble. ethanol, isopropanol, acetone, toluene : very slightly soluble. |
| SADT | 75℃ |
*SADT: Self-accelerating decomposition temperature
Packaging & Storage conditions
| Packaging | 5kg / 500g |
|---|---|
| Storage conditions | keep under 10℃ |
Related laws and regulations
| TSCA | Not Listed |
|---|---|
| EINECS | Not Listed |
| REACH | Not Listed |
Aqueous solution polymerization of acrylamide at different pH values
Polymerization progresses at pH 3 to 9.
The "Azo Polymerization Initiator Decomposition Simulator" allows you to easily visualize the decomposition of azo polymerization initiators in a graph. You can use all 15 types of azo initiators, helping you select the best initiator for your polymerization conditions and optimize your polymerization process.
