Polylactic acid, stereocomplex membrane material thereof and preparation method
A technology of stereocomplex and polylactic acid is applied in the field of biodegradable polymer material modification, which can solve the problems of insufficient degradation performance and recycling thermoplastic reprocessing performance, and achieve good toughness, improved mechanical properties, and high mechanical strength. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0045] (1) Add ethylene glycol, δ-valerolactone and racemic lactide into a three-necked flask, then raise the temperature to 120°C under a nitrogen atmosphere, add stannous octoate, and then reflux for 24 hours. After cooling, dissolve in dichloro methane, precipitated with methanol, and dried to obtain a dihydroxy-functionalized copolyester in which the total substance amount of δ-valerolactone and racemic lactide is 100:1 to the amount of substance of the starter, and δ- The substance ratio of valerolactone and racemic lactide is 3:7; the consumption of stannous octoate is 0.1% of the total substance amount of δ-valerolactone and racemic lactide;
[0046] (2) Add dihydroxy-functionalized copolyester and L-lactide into a three-necked flask, remove water and residual solvent, heat up to 120°C under nitrogen atmosphere, add stannous octoate to reflux reaction for 24 hours, and dissolve in dichloromethane after cooling Methane, precipitated with methanol, and dried to obtain two...
Embodiment 2
[0051] (1) Add diethylene glycol, ε-caprolactone and racemic lactide into a three-necked flask, then raise the temperature to 130°C in a nitrogen atmosphere, add stannous octoate, and then reflux for 36 hours. After cooling, dissolve in two Chloromethane, precipitated with methanol, and dried to obtain a dihydroxy-functionalized copolyester in which the total substance amount of ε-caprolactone and racemic lactide is 100:1 to that of the initiator, and ε- The substance ratio of caprolactone and racemic lactide is 5:5; the consumption of stannous octoate is 0.1% of the total substance quantity of ε-caprolactone and racemic lactide;
[0052] (2) Add dihydroxy-functionalized copolyester and D-lactide into a three-necked flask, remove water and residual solvent, raise the temperature to 150°C under nitrogen atmosphere, add stannous octoate to reflux for 36 hours, and dissolve in distilled water after cooling. Chloromethane, precipitated with methanol, and dried to obtain a dihydrox...
Embodiment 3
[0057] (1) Add diethylene glycol, δ-valerolactone and ε-caprolactone in a three-necked flask, then raise the temperature to 120°C under a nitrogen atmosphere, add stannous octoate to reflux for 24 hours, and dissolve in dichloromethane after cooling , precipitated with methanol, and dried to obtain two hydroxyl functionalized copolyesters, wherein the total substance amount of δ-valerolactone and ε-caprolactone and the substance amount ratio of the initiator are 100:1, and δ-valerolactone The substance ratio of ester and ε-caprolactone is 5:5; the consumption of stannous octoate is 0.3% of the total substance amount of δ-valerolactone and ε-caprolactone;
[0058] (2) Add dihydroxy-functionalized copolyester and L-lactide into a three-necked flask, remove water and residual solvent, heat up to 120°C under nitrogen atmosphere, add stannous octoate to reflux reaction for 24 hours, and dissolve in dichloromethane after cooling Methane is precipitated with methanol and dried to obt...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Tensile strength | aaaaa | aaaaa |
| Tensile strength | aaaaa | aaaaa |
| Tensile strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More