If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
182427
Polystyrene
average Mw ~280,000 by GPC
Synonym(s):
PS
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€63.80
€126.00
€213.00
About This Item
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form
beads or pellets
mol wt
average Mw ~280,000 by GPC
refractive index
n20/D 1.5916
transition temp
Tg 100 °C
density
1.047 g/mL at 25 °C
SMILES string
c1(ccccc1)C=C
InChI
1S/C8H8/c1-2-8-6-4-3-5-7-8/h2-7H,1H2
InChI key
PPBRXRYQALVLMV-UHFFFAOYSA-N
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This Item | 430102 | 327743 | 327719 |
|---|---|---|---|
| refractive index n20/D 1.5916 | refractive index n20/D 1.59 | refractive index - | refractive index - |
| form beads or pellets | form beads or pellets | form powder | form powder |
| density 1.047 g/mL at 25 °C | density - | density - | density - |
| mol wt average Mw ~280,000 by GPC | mol wt average Mw ~192,000 | mol wt average Mw 20,000 (Typical) | mol wt average Mw 2,500 (Typical) |
| transition temp Tg 100 °C | transition temp softening point 107 °C (Vicat, ASTM D 1525) | transition temp - | transition temp - |
| Quality Level 100 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
General description
Application
Polystyrene can be used as a precursor to prepare graphene film and 3D graphene sponges by pyrolysis under argon atmosphere. The filmogenic property of polystyrene can be exploited to prepare 3D graphene sponges with uniform pore sizes.
It can also be used to prepare dyed polystyrene (PS) film for routine dosimetry in radiation processing. Dyed PS film has high post-irradiation stability.
Features and Benefits
- With a high molecular weight of ~280,000, our polystyrene delivers high rigidity and durability, ideal for packaging, and insulation.
- Glass transition temperature of ~100 °C ensures stability in moderate heat, making it a good choice for electronics, and labware.
- A refractive index of 1.5916 and a consistent density of 1.047 g/mL, offers superior optical clarity and precision—ideal for transparent containers, lenses, and molded parts.
- Offered in convenient beads or pellets, to ease the process across a wide range of manufacturing setups.
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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What is the tacticity of this PS? Is it atactic?
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This product is atactic.
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Hello, I'd like to know how these polystyrene samples are typically synthesized? (Free radical polymerization? Anionic living polymerization?) Thanks, Stanley
1 answer-
Unfortunately, the method of polymerization is considered proprietary.
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