POLY(DIMETHYLSILANE) Property

InChI

InChI=1S/C2H6Cl2Si/c1-5(2,3)4/h1-2H3

InChIKey

LIKFHECYJZWXFJ-UHFFFAOYSA-N

SMILES

[Si](Cl)(Cl)(C)C

EPA Substance Registry System

Silane, dichlorodimethyl-, homopolymer (30107-43-8)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Hazard statements

H302Harmful if swallowed

H312Harmful in contact with skin

H315Causes skin irritation

H319Causes serious eye irritation

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

P233Keep container tightly closed.

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304IF INHALED:

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P312Call a POISON CENTER or doctor/physician if you feel unwell.

P321Specific treatment (see … on this label).

P322Specific measures (see …on this label).

P330Rinse mouth.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

P340Remove victim to fresh air and keep at rest in a position comfortable for breathing.

P362Take off contaminated clothing and wash before reuse.

P363Wash contaminated clothing before reuse.

P403Store in a well-ventilated place.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

POLY(DIMETHYLSILANE) Chemical Properties,Usage,Production

Physical properties

The structure of polydimethylsilane crystals has been determined by use of X-ray diffraction measurements and a theoretical diffraction pattern. The crystal structure obtained is monoclinic (a = 0.745 nm, b = 0.724 nm, c = 0.389 nm, and γ = 67.1°), in which the primitive translation vector c correspinds to the period of a one-dimensional silicon backbone having an all-trans conformation.

Uses

Polydimethylsilane (PDMS) is a precursor of silicon carbide is a pre-ceramic polymer precursor. It has wide application prospects in the areas of photoconductivity, LED, nonlinear optical material and so on, which is the reason it draws people's great attention.

Reactions

Polycarbosilane was synthesized from polydimethylsilane in the presence of ZSM-5 (Si/Al=30) as a catalyst at 350oC-400oC.
The polycarbosilane (PCS), which is the precursor of SiC fiber, was synthesized under high pressure by thermal decomposition of polydimethylsilane.

References

[1] XIANGZHEN CHENG. Structure and properties of polycarbosilane synthesized from polydimethylsilane under high pressure[J]. Journal of Applied Polymer Science, 2005, 99 3: 1188-1194. DOI:10.1002/app.22594.
[2] M. BORDEAU. Competitive electrochemical synthesis of polydimethylsilane without solvent[J]. Journal of The Chemical Society, Chemical Communications, 1991, 1 1: 1476-1477. DOI:10.1039/C39910001476.
[3] S. FURUKAWA Kenta T. Structure and orientation of polydimethylsilane films[J]. Solid State Communications, 1993, 87 1: 931-934. DOI:10.1016/0038-1098(93)90732-3.