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GC9057 Silane
GC9057silane,vinyltrimethoxysilane, is used as a polymer Modifier via grafting reactions.the resulting pendant Trimethoxysilyl groups can function as moistire-activated crosslinking sites.the silane grafted polymer is processed as a Thermoplastic and crosslinking occurs after Fabrication of the finished article upon exposure to moisture.

Typical Physical Properties

      Chemical Name             Vinyltrimethoxysilane
      Color and Appearance        Colorless transparent liquid
      Density(ρ20)g/cm3                0.9700±0.0005
      Refractive Index             1.3930±0.0005
      Boiling Point                123[760mmHg]
      Min.Purity by GC            98.0%
      Cas no.                    2768-02-7
      EINECS NO.               220-449-8

  • Polymer modification 

GC9057 is used to modify polyethylene and other polymers by grafting its vinyl Group to the polymer backbone using a radical initiator,such as peroxide.this provide A polymer with pendant trimethoxysilyl groups that ma be used as mositure-activated Crosslinking sites vis hydrolysis of the alkoxy groups followed by condensation of The resulting silanols.

  • Crossing of silane-grafted polymers.

The reaction of silane-grafted polyethylene to form a crosslinked or vulcanized Polyethlene used water to form the crosslinks.this technology is widely used around The world for commerical application in wire and cable insulation,tubing ,and other Similar uses.

The basic reaction sequence is as follows;polyethylene is reacted (grafted)with Vinyltrimethoxysilane,using a peroxide initiator,in an extruder.the grafted Polyethylene is then formed into a finished product,such as cable jacketing,wire Insulation,or pipe.the forming step is usually done by a second extrusion,during which A catalyst for the mositure-cure step is added.finally,the formed article is exposed to Moisture or hot water to cause hydrolysis of the silane and condensation to form Crosslinks via Si-O-Si bond formation.

Benefits of crosslinking

  • Higher maximum use temperature
  • Reduce deformation under load (creep)
  • Improved chemical resistance
  • Superior environmental stress crack resistance
  • Increased abrasion resistance
  • Improved impact strength
  • Memory characteristics(shrink film,tubing)
  • Improved impact strength

Advantages of silane crosslinking over radiation or peroxide crosslinking

  • Low capital investment
  • Low operating(energy)costs
  • Higher productivity
  • Processing versatility
  • Thick,thin,or variable thinknesses possible
  • Complex shaps possible
  • Wilder processing latitude (control of premature crosslinking)
  • Useful with filled composites
  • Applicable to all polyethylene densities and copolymers
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