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THERMPAN AND ITS PROPERTIES

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The physical and mechanical properties of Thermpan may vary due to the type of copolymer used in the preparation of the resin and its molecular weight. For a PAN copolymer with 6% polyvinyl acetate with Mw of 120000 Daltons the following values are found:

Without drawing:

Composition
PAN- co-polyvinyl acetate 6%
Molecular Weight (Mw)
120.000
Extrusion temperature
220°C
Tenacity (MPa)
45
Module (GPa)
2,9
Specific deformation (%)
5,0







With 14X drawing :

Composition
PAN- co- Acetato de Polivinila 6%
Molecular Weight (Mw)
120.000
Extrusion temperature
220°C
Drawing temperature
180ºC
Tenacity (MPa)
625
Module (GPa)
10,1
Specific deformation (%)
5 a 8








For 25 dtex multifilament fibers produced with the same polymer and draw ratio of 8X the tenacity is 23 cN / tex and the elongation is 11%.

The surface energy of films of the Thempan resin evaluated in terms of its contact angle (θ) is approximately 65 ° and can reach 28 ° with treatment of its surface with nitrogen plasma, which means that it presents better adhesion than the PP (90 ° ), PET (92 °) and PVC (86 °), for example, to common cement or adhesives on the market.

The thermpan fibers can be easily deplasticized with hot water washing and after this process have the same thermal stabilization characteristics as the PAN fibers obtained by wet spinning and can therefore be converted to carbon fiber.

Thermal stabilization of Thermpan fibers at 190ºC





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