Poly(methyl methacrylate) (PMMA), MW ~185,000, is used as a molecular-weight reference in gel permeation chromatography (GPC) and size-exclusion chromatography (SEC). This grade has a nominal weight-average molecular weight of approximately 185,000 and an Mw/Mn of approximately 1.10.
Synonyms: PMMA; polymethyl methacrylate.
The GPC molecular-weight range for this grade is 175,000-195,000. PMMA has the repeat-unit formula (C5H8O2)n.
Key Properties
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Polymer: Poly(methyl methacrylate) (PMMA)
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Product number: 18756
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CAS number: 9011-14-7
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Nominal molecular weight: ~185,000
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Mw (GPC): 175,000-195,000
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Mw/Mn: ~1.10
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Repeat-unit formula: (C5H8O2)n
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Appearance: Fine white powder
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Storage temperature: Room temperature
Applications
GPC/SEC Calibration
PMMA with a defined molecular-weight range is used for GPC/SEC calibration in polymer molecular-weight analysis.
Polymer Molecular-Weight Analysis
This ~185,000 MW PMMA grade is used in GPC/SEC workflows requiring a polymer reference in this molecular-weight range.
Solubility & Compatibility
PMMA is soluble in chloroform, dichloromethane, toluene, acetone, benzene, tetrahydrofuran (THF), and methyl ethyl ketone.
Preparation Tips
- Select a solvent compatible with the GPC/SEC method and instrument configuration
- Allow the polymer to dissolve completely before analysis
- Use consistent solution preparation and chromatographic conditions when comparing calibration points
Handling & Storage
- Store at room temperature
- Keep cool and store in a well-ventilated location
- Use good laboratory ventilation during handling
- Wear protective gloves, safety glasses, and suitable protective clothing
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FAQ
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1. What does PMMA stand for?
PMMA stands for poly(methyl methacrylate), the polymer formed from methyl methacrylate.
2. What is PMMA MW ~185,000 used for?
This PMMA grade is used for GPC/SEC calibration and polymer molecular-weight analysis.
3. What does MW ~185,000 mean?
The ~185,000 designation refers to the nominal weight-average molecular weight (Mw) of the PMMA. The GPC range for this grade is 175,000-195,000.
4. What is the chemical formula of PMMA?
PMMA has the repeat-unit formula (C5H8O2)n, where n represents the number of repeating methyl methacrylate units in the polymer chain.
5. Is PMMA the same as poly(methyl acrylate)?
No. PMMA is poly(methyl methacrylate), while poly(methyl acrylate) (PMA) is a different polymer formed from methyl acrylate.
Safety & Documentation
Use good laboratory ventilation and appropriate personal protective equipment when handling PMMA. Refer to the Safety Data Sheet (SDS) for complete handling, storage, and safety information.
