Poly(styrene/maleic anhydride) [67:33], MW 7,500, also known as SMA or styrene-maleic anhydride copolymer, is an amphiphilic copolymer with reactive anhydride functionality. It is used in surface modification, dispersant and stabilizer systems, coatings, adhesives, and specialty polymer formulation work.
Synonyms / related names: SMA; styrene-maleic anhydride copolymer; 2,5-furandione, telomer with ethenylbenzene.
This product has a listed molecular weight of approximately 7,500 and a 67:33 styrene-to-maleic anhydride molar ratio. Its anhydride functionality makes it useful in research and formulation workflows where polymer reactivity, adhesion, compatibility, and surface interaction are important.
Researchers, formulators, and industrial users may use poly(styrene/maleic anhydride) in pigment dispersions, emulsions, surface treatment systems, coating formulations, adhesive systems, and functional polymer development.
Key Properties
- Styrene-maleic anhydride copolymer
- CAS Number: 9011-13-6
- Product Number: 03497
- Styrene:maleic anhydride molar ratio: 67:33
- Molecular Weight: ~7,500
- Intrinsic viscosity: ~0.68
- Formula: (C8H8.C4H2O3)x
- Appearance: White to off-white powder
- % Volatiles: <4.00%
- Refractive Index: 1.564
- Recommended for laboratory reagent use and manufacture of substances
Applications
Surface Modification
Poly(styrene/maleic anhydride) may be used in surface modification workflows where reactive anhydride groups are evaluated for interaction with compatible substrates, fillers, coatings, or polymeric surfaces.
Dispersants & Stabilizers
SMA copolymers may be used in pigment dispersions, emulsions, and formulation systems where amphiphilic polymer structure can support compatibility and dispersion stability.
Coatings & Adhesives
This copolymer may be used in coatings and adhesive formulation research where adhesion, compatibility, film behavior, and reactive functionality are important performance considerations.
Specialty Polymer Formulation
Poly(styrene/maleic anhydride) is useful in polymer modification, functional material development, and formulation studies involving reactive anhydride-containing copolymers.
Compatibility & Formulation Considerations
- Anhydride functionality may react with compatible hydroxyl, amine, or other nucleophilic groups under appropriate conditions
- Performance depends on formulation chemistry, solvent or carrier system, temperature, pH, and processing conditions
- Evaluate compatibility with pigments, fillers, binders, additives, and substrates before scale-up
- Moisture exposure should be considered when working with anhydride-containing materials
Final performance should be verified under the user’s specific application conditions, including concentration, solvent system, processing method, drying or curing conditions, and substrate compatibility.
Preparation Tips
- Use clean, dry equipment when preparing formulations
- Add gradually with appropriate mixing to support uniform dispersion or dissolution
- Confirm compatibility with the intended solvent, carrier, binder, pigment, filler, or substrate system
- Run small-scale formulation trials before production or process transfer
Handling & Storage
- Store at room temperature
- Keep container tightly closed when not in use
- Store in a well-ventilated place and keep cool
- Use only outdoors or in a well-ventilated area
- Avoid breathing dust, fume, gas, mist, vapors, or spray
- Wear protective gloves, safety glasses, and suitable protective clothing
- Refer to the Safety Data Sheet before handling
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FAQ
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1. What is Poly(styrene/maleic anhydride) [67:33], MW 7,500 used for?
Poly(styrene/maleic anhydride) [67:33], MW 7,500 is used in surface modification, dispersants, stabilizers, coatings, adhesives, and functional polymer formulation research.
2. What is the molecular weight of this SMA product?
The listed molecular weight is approximately 7,500.
3. What does the 67:33 ratio mean?
The 67:33 value refers to the listed molar ratio of styrene to maleic anhydride in the copolymer.
4. What is the CAS number?
The CAS number for Poly(styrene/maleic anhydride) [67:33], MW 7,500 is 9011-13-6.
5. How should Poly(styrene/maleic anhydride) [67:33], MW 7,500 be stored?
Store the product at room temperature in a well-ventilated place with the container tightly closed. Review the Safety Data Sheet for complete storage, handling, and personal protective equipment guidance.
Safety & Documentation
Poly(styrene/maleic anhydride) [67:33], MW 7,500 should be handled with good ventilation, protective gloves, safety glasses, suitable protective clothing, and standard laboratory or industrial safety procedures. The current SDS classifies the product as fatal if inhaled. Avoid breathing dust, fume, gas, mist, vapors, or spray. Refer to the Safety Data Sheet (SDS) and product specification for complete handling, storage, hazard, and technical information.
