Poly(dimethylsiloxane-b-ethylene oxide), methyl terminated, is an amphiphilic block copolymer that combines a flexible, hydrophobic PDMS segment with a hydrophilic ethylene oxide segment. The methyl-terminated structure supports surface-active behavior while limiting end-group reactivity in formulation and surface-modification work.
Related names: PDMS-b-PEO, poly(dimethylsiloxane-block-ethylene oxide), methyl-terminated PDMS-PEO block copolymer, and dimethylsiloxane-ethylene oxide block copolymer.
This copolymer has a 25:75 ratio, molecular weight of 600, viscosity of approximately 20 cps, refractive index of 1.442, and density of 1.07. Its balance of silicone and ethylene oxide character makes it useful in research and formulation work involving biomaterials, drug delivery systems, coatings, surface treatments, emulsions, and dispersions.
Key Properties
- Amphiphilic block copolymer containing dimethylsiloxane and ethylene oxide segments
- Methyl-terminated structure
- 25:75 ratio
- Product Number: 09780
- CAS Number: 68937-54-2
- Molecular weight: 600
- Viscosity: approximately 20 cps
- Refractive index: 1.442
- Density: 1.07
Applications
Biomedical & Drug Delivery Research
Poly(dimethylsiloxane-b-ethylene oxide), methyl terminated, is used in biomaterials research, nanocarrier formulation studies, and surface-modification work where amphiphilic polymer behavior, silicone character, and ethylene oxide functionality are relevant.
Coatings & Surface Treatments
The PDMS and ethylene oxide segments make this copolymer useful in coating, lubricant, and surface-treatment formulations where hydrophobic-hydrophilic balance, surface interaction, and surface-wetting behavior need to be adjusted.
Emulsifiers & Surfactants
This amphiphilic block copolymer may function as a stabilizing or surface-active component in emulsions, dispersions, and related formulation systems.
Solubility & Compatibility Considerations
- Amphiphilic structure combines hydrophobic PDMS and hydrophilic ethylene oxide segments
- Compatibility depends on solvent system, polymer concentration, substrate chemistry, and formulation components
- Surface activity may vary with phase composition, temperature, mixing conditions, and the surrounding formulation environment
- Compatibility should be confirmed with oils, aqueous phases, solvents, resins, surfactants, actives, fillers, and other formulation components before scale-up
Final formulation performance depends on the application system, PDMS-to-ethylene oxide balance, concentration, processing conditions, substrate chemistry, and intended use environment.
Application Tips
- Evaluate polymer concentration and mixing order in small-scale formulation trials
- Screen solvent or phase compatibility before adding to complex formulations
- Assess surface-wetting, emulsion stability, and dispersion behavior under intended processing conditions
- Confirm compatibility with all formulation components before production or application development use
Handling & Storage
- Store at room temperature
- Use gloves and chemical goggles when handling
- Keep container tightly closed when not in use
- Handle as a combustible, irritant material
- Use standard laboratory handling practices and appropriate personal protective equipment
- Follow the product SDS for complete handling, storage, cleanup, and disposal guidance
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FAQ
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1. What is Poly(dimethylsiloxane-b-ethylene oxide), methyl terminated?
It is an amphiphilic block copolymer containing a hydrophobic PDMS segment and a hydrophilic ethylene oxide segment. The methyl-terminated structure provides a relatively nonreactive end group profile for formulation and surface-modification work.
2. What does the 25:75 ratio mean?
The 25:75 ratio describes the product’s dimethylsiloxane-to-ethylene oxide block composition. This balance influences silicone character, hydrophilicity, surface activity, and compatibility in different formulation systems.
3. What applications is this copolymer used for?
It is used in research and formulation work involving biomaterials, drug delivery systems, coatings, surface treatments, emulsions, dispersions, and surfactant applications.
4. Why is this polymer useful in emulsions and dispersions?
The combination of hydrophobic PDMS and hydrophilic ethylene oxide segments gives the copolymer amphiphilic character, which can support surface activity and stabilization in selected emulsion or dispersion systems.
5. How should this product be stored and handled?
Store at room temperature. Use gloves and chemical goggles when handling, and review the Safety Data Sheet before use for complete guidance on combustible and irritant material handling, storage, cleanup, and disposal.
Safety & Documentation
Review the product specification and Safety Data Sheet before use. Handle with gloves, chemical goggles, and appropriate laboratory precautions. Follow SDS guidance for combustible and irritant material handling, storage, cleanup, and disposal.
