Poly(dimethylsiloxane), vinyl terminated

CAS 68083-19-2Micro / NanoElectronics

Poly(dimethylsiloxane), vinyl terminated (CAS 68083-19-2) is a versatile silicone polymer characterised by the presence of vinyl functional groups at its chain ends. With an average molecular weight of approximately 25,000 g/mol, this fluid exhibits a viscosity typically ranging from 850-1,150 cSt at 25°C. Its unique vinyl termination makes it a key component in cross-linking reactions, particularly in the formulation of elastomers, sealants, and encapsulants for electronic applications.

IUPAC: PDMS
Synonyms: PDMS vinyl terminatedVinyl-terminated polydimethylsiloxanePolydimethylsiloxane, vinyl-terminatedVinyl terminated PDMS

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Poly(dimethylsiloxane), vinyl terminated — chemical structure, CAS 68083-19-2; Materials Science, fine chemical supplied by Tech Serve Solutions

BioelectronicsHomopolymersMaterials ScienceMicro/NanoElectronicsMicrofluidicsPDMSPDMS Elastomers/ResinsPDMS and Silicone PolymersPolymer SciencePolymers

01 /Applications

Elastomer Formulation

This vinyl-terminated PDMS is a crucial monomer for creating silicone elastomers through addition cure mechanisms. These elastomers are valued for their flexibility, thermal stability, and electrical insulation properties.

Electronic Encapsulation

Its dielectric properties and protective qualities make it suitable for encapsulating sensitive electronic components, safeguarding them against moisture, vibration, and thermal stress.

Mold Making

The material's ability to form flexible, durable molds with good release characteristics makes it a preferred choice for intricate casting and prototyping.

Sealants and Adhesives

Vinyl-terminated PDMS serves as a base for formulating sealants and adhesives that require good thermal and environmental resistance, often used in demanding industrial settings.

02 /Properties

Boiling point	>93 °C(lit.)
Density	0.965 g/mL at 25 °C(lit.)
Refractive index	n20/D 1.4052
Viscosity	850-1,150 cSt(25 °C)(lit.)
Application	Mold-making elastomers and encapsulants and sealants for electronic components.

03 /Safety & handling

Protective equipment	Eyeshields, Gloves
Flash point	>113 °C / >235.4 °F
Water hazard class (WGK, DE)	3

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

68083-19-2

MDL number

MFCD00197935

PubChem substance

24867115

05 /Additional specifications

Mol Wt	average Mw ~25,000average Mw ~25,000
Iodine Value	2.2‑3.5

06 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

07 /Frequently asked questions

What is Poly(dimethylsiloxane), vinyl terminated used for?

Poly(dimethylsiloxane), vinyl terminated is primarily used in the formulation of mold-making elastomers, sealants, and encapsulants for electronic components. It is also applicable in microfluidics and bioelectronics.

What is the CAS number and formula for Poly(dimethylsiloxane), vinyl terminated?

The CAS number is 68083-19-2. The chemical formula for the repeating unit is (C2H6OSi)n, with vinyl termination. The molecular weight is approximately 25,000 g/mol.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Poly(dimethylsiloxane), vinyl terminated with an average Mw of approximately 25,000 g/mol. We do not represent this product as USP, BP, EP or other pharmacopoeia grades; it is supplied for research and industrial use.

What are the safety considerations when handling this product?

When handling Poly(dimethylsiloxane), vinyl terminated, it is advisable to wear eyeshields and gloves. Refer to the Safety Data Sheet for comprehensive hazard information. The flash point is above 113°C.

How is this chemical packed and shipped?

Products are carefully packed to ensure stability during transit. Tech Serve Solutions is experienced in exporting fine chemicals globally, adhering to international shipping regulations.

How can I request a sample or quote for Poly(dimethylsiloxane), vinyl terminated?

To request a sample or a quote, please use the contact form on our website or contact our sales department directly, specifying the product CAS number 68083-19-2.