synthesis of polyvinyl alcohol
Abstract
Polyvinyl alcohol synthetic quenching medium is made up of polymer (17-88) polyvinyl alcohol (white
- Promulgator: ChengChi
- Send date：2025-05-15
- Tags: polyvinyl,
Keywords: polyvinyl,
Polyvinyl alcohol synthetic quenching medium
Polyvinyl alcohol synthetic quenching medium is made up of polymer (17-88) polyvinyl alcohol (white solid powder) with a small amount of preservative, rust inhibitor, defoamer and water, and is sold as concentrated liquid.
The molecular formula of PVA is:
-CH2-CHn CH2-CHm
OHOCO
CH3
The domestic concentration formula is shown in Table 1, and the technical index is shown in Table 2.
Table 1 Formulation of polyvinyl alcohol synthetic quenchant (concentrate)
Polymerization degree 1750 alcoholysis degree 88%; 10| Composition | Content (%) |
| Antirust agent (triethanolamine) | 1 |
| Preservative (sodium benzoate) | 0.2 |
| Defoamer (Swire oil) | 0.02 |
| Water | Allowance |
Table 2 Technical specifications of polyvinyl alcohol quenching medium (standard JB4393 & mdash;1999)
| Name | Indicator |
| Uniform Dissolved Translucent to light yellow Liquid | |
| Solid content (mass fraction,%) | 10 〜12 |
| Conditional viscosity (based on Tu -1 viscometer) | 20-50 |
| Density (g/> cm3) | 1.015-1.035 |
| pH | 6 〜8 |
| refractive index | 1.3470-1.3520 |
| conductivity (S/m ~ 0.2) |
More synthesis of polyvinyl alcohol: www.quenchtank.com/view-393.html
