9011-11-4

Basic information

• Product Name: POLY(STYRENE-CO-ALPHA-METHYLSTYRENE)
• Synonyms: Ethenylbenzene,copolymerwith(1-methylethenyl)benzene,(.alpha.-Methylstyrene-styrene)copolymer;ethenyl-benzenpolymerwith(1-methylethenyl)benzene;POLY(STYRENE-CO-ALPHA-METHYLSTYRENE);POLY(STYRENE-CO-ALPHA-METHYLSTYRENE), SO FTENING POINT 100 DEG. C;POLY(STYRENE-CO-ALPHA-METHYLSTYRENE), SO FTENING POINT 119 DEG. C;Styrene-α-methylstyrene polymer;poly(styrene-co-α-methylstyrene);Styrol, a-methylstyrol, copolymer
• CAS NO: 9011-11-4
• Molecular Formula: C17H18
• Molecular Weight: 222.32482
• Product Categories: Polymers;Hydrophobic Polymers;Styrene copolymers;Styrenes;Hydrophobic Polymers;Materials Science;Polymer Science;Styrene copolymers
• Mol File: 9011-11-4.mol
• Article Data: 0

Chemical Properties

• Melting Point: 171-188 °C
• Boiling Point: 162.5°Cat760mmHg
• Flash Point: 45.6°C
• Appearance: /
• Density: 1.07 g/mL at 25 °C
• Vapor Pressure: 2.83mmHg at 25°C
• Solubility: hydrocarbons, esters and ketones: soluble
• CAS DataBase Reference: POLY(STYRENE-CO-ALPHA-METHYLSTYRENE)(CAS DataBase Reference)
• NIST Chemistry Reference: POLY(STYRENE-CO-ALPHA-METHYLSTYRENE)(9011-11-4)
• EPA Substance Registry System: POLY(STYRENE-CO-ALPHA-METHYLSTYRENE)(9011-11-4)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 9011-11-4(Hazardous Substances Data)

Usage

Uses

Additive to sealants, caulks, adhesives, and coatings.

Preparation

a-Methylstyrene is obtained from benzene and propylene by the following route:a-Methylstyrene is not readily polymerized by free radical initiators but it is susceptible to cationic polymerization. Polymerization can be effected, for example, in ethyl chloride at -130°C with aluminium chloride but poly(a-methylstyrene) prepared in this manner is a clear brittle solid which has little commercial application. Polymers with much lower molecular weight (300-600) obtained by using alkaline earth catalysts, however, are viscous liquids and have found some use as plasticizers in surface coatings and adhesives. Styrene-a-methylstyrene copolymers are marketed for extrusion and injection moulding. Compared to polystyrene, these copolymers have the advantage of higher softening points (104-106°C); they too are transparent and colourless.

InChI:InChI=1/C9H10.C8H8/c1-8(2)9-6-4-3-5-7-9;1-2-8-6-4-3-5-7-8/h3-7H,1H2,2H3;2-7H,1H2