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430072

Sigma-Aldrich

Poly(styrene-co-butadiene)

butadiene 4 wt. %, melt index 6 g/10 min (200°C/5kg)

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About This Item

Linear Formula:
[CH2CH(C6H5)]x(CH2CH=CHCH2)y
CAS Number:
9003-55-8
MDL number:
MFCD00134010
UNSPSC Code:
12162002
PubChem Substance ID:
24866909
NACRES:
NA.23
Pricing and availability is not currently available.

form

pellets

Quality Level

100

melt index

6 g/10 min (200°C/5kg)

composition

butadiene, 4 wt. %

hardness

105 (Rockwell R, ASTM D 785)

transition temp

softening point 103 °C (Vicat, ASTM D 1525)

density

1.04 g/mL at 25 °C

SMILES string

C=CC=C.C=Cc1ccccc1

InChI

1S/C8H8.C4H6/c1-2-8-6-4-3-5-7-8;1-3-4-2/h2-7H,1H2;3-4H,1-2H2

InChI key

MTAZNLWOLGHBHU-UHFFFAOYSA-N

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Application

Molded or extruded into toys, packaging, appliances, communication cassettes, dinnerware and serviceware.

Features and Benefits

Better impact resistance than polystyrene. Amenable to various processing methods. Susceptible to environmental (UV) degradation.

Physical form

High-impact amorphous thermoplastic.

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCW9962
MKCW0185
MKCP9598
MKCL5279
MKCD4605

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Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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/449/386/product-dating-information-mk.pdf

      Helpful?

  3. Can I get the number average molecular weight(Mn), Mw and polydispersity of this polymer?

    1 answer

    1. The molecular weight and polydispersity are not determined for this product. However, historical data indicates a molecular weight of approximately 150,000 daltons with a number average molecular weight (Mn) of approximately 70,000 daltons.

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