PEG Block Copolymers
Diblock & Triblock Amphiphilic Polymers for Advanced Drug Delivery
Versatile Amphiphilic Systems
Our PEG-based diblock and triblock copolymers combine hydrophilic polyethylene glycol (PEG) with biodegradable hydrophobic blocks.
These advanced materials enable spontaneous self-assembly into micelles, thermosensitive hydrogels, and sustained-release drug delivery systems. By selecting different hydrophobic blocks like PCL, PLA, or PDLLA, we offer tailored degradation rates and mechanical properties for diverse biomedical applications.
Core Capabilities
- Self-assembly into stable micellar carriers
- In situ gelation at body temperature (Triblocks)
- Tunable degradation from weeks to years
- Highly biocompatible metabolites
Available Block Copolymer Systems
A comprehensive range of block architectures for every delivery challenge.
| Copolymer Type | Architecture | Key Features | Applications |
|---|---|---|---|
| PCL-PEG / PCL-PEG-PCL | Diblock / Triblock | Slow degradation (2-4 yrs), high flexibility | Long-term implants, injectable depots |
| PDLLA-PEG / PDLLA-PEG-PDLLA | Diblock / Triblock | Amorphous, moderate degradation (months) | Micelles, nanoparticles, injectable gels |
| PLA-PEG / PLA-PEG-PLA | Diblock / Triblock | Semicrystalline, high strength, slow release | Structural scaffolds, high-strength implants |
| PDO-PEG / PDO-PEG-PDO | Diblock / Triblock | Flexible, moderate degradation (6-12 mo) | Sutures, soft tissue repair, elastic gels |
| PTMC-PEG / PTMC-PEG-PTMC | Diblock / Triblock | Elastomeric, pH-neutral degradation | Cardiovascular devices, elastic scaffolds |
Hydrophobic Block Selection Guide
Choose the right base block based on degradation and mechanical needs.
PCL (Polycaprolactone)
- Degradation: 2-4 years
- Tg: -60°C (Highly flexible)
- Best for: Long-term depots, slow release systems.
PDLLA (Poly-D,L-lactide)
- Degradation: 12-16 months
- Tg: 50-60°C (Amorphous)
- Best for: Moderate release, micelles, nanoparticles.
PLA (Polylactide)
- Degradation: 6-24 months
- Tg: 60-65°C (Semicrystalline)
- Best for: Structural scaffolds, high strength implants.
PDO (Polydioxanone)
- Degradation: 6-12 months
- Tg: -10°C (Flexible)
- Best for: Sutures and soft tissue repair.
PTMC (Polytrimethylene carbonate)
- Degradation: 6-18 months
- Tg: -15°C (Elastomeric)
- Best for: Elastic devices, pH-neutral degradation.
Diblock vs Triblock Architecture
| Property | Diblock (A-B) | Triblock (A-B-A) |
|---|---|---|
| Structure | Hydrophobic-PEG | Hydrophobic-PEG-Hydrophobic |
| Self-Assembly | Micelles, spheres | Micelles, bridged networks, gels |
| Thermosensitivity | Limited | Strong (sol-gel ~30-40°C) |
| Mechanical Strength | Moderate | Higher (physical crosslinks) |
| Best For | Nanoparticles, coatings | Injectable gels, 3D printing |
Standard Configurations
Diblock Options
PEG 1,000 - 10,000 Da | Hydrophobic block 1,000 - 15,000 Da
Triblock Options
PEG Center 1,000 - 6,000 Da | Total MW 2,000 - 30,000 Da
Custom Ratios
Specific hydrophobic:hydrophilic ratios tailored to your application.
Applications by Delivery Need
Injectable Depots
Thermosensitive PCL or PDLLA gels for weekly/monthly release.
Micellar Delivery
Diblock systems for solubilizing hydrophobic cancer drugs.
Tissue Engineering
PLA and PDO based scaffolds for regenerative medicine.
Long-Term Implants
High-MW PCL systems for chronic disease management.
Technical Specifications Summary
| Parameter | Specification |
|---|---|
| Synthesis Method | Ring-opening polymerization (Sn-catalyst) |
| Polydispersity (Đ) | < 1.3 (narrow distribution) |
| End Groups | Hydroxyl (can be functionalized upon request) |
| Characterization | ¹H NMR, GPC, DSC, FTIR verified |
| Storage | -20°C, desiccated, inert atmosphere |
| Purity | > 98% (residual monomer < 0.5%) |
Why Choose Our PEG Block Portfolio?
High-purity polymers designed for clinical translation.
Biocompatible
All components FDA-studied; degrade to natural metabolites.
Tunable Properties
Adjust block ratios for gelation temp, degradation, and mechanics.
Targeted Delivery
Micelles enable passive targeting via EPR effect.
Injectable Systems
Thermosensitive triblocks enable minimally invasive delivery.
Ready to Innovate?
Contact our technical team for custom block ratios, functionalization, and application support.