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Sempere Alemany, Francisco Javier.pdf - RUA - Universidad de ...

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436 Apéndice D<br />

D.5 – Desarrollo <strong>de</strong>l mo<strong>de</strong>lo cinético aplicado a la <strong>de</strong>scomposición térmica<br />

(TGA) <strong>de</strong> las mezclas binarias EVA-RET.<br />

k<br />

EVA ⎯<br />

* k<br />

EVA ⎯<br />

k<br />

EVA(<br />

i)<br />

⎯<br />

kRet<br />

Ret ⎯ ⎯⎯ →s<br />

dw<br />

dt<br />

Total<br />

EVA−Ret<br />

dw<br />

dt<br />

Total<br />

EVA−Ret<br />

D1,<br />

EVA ⎯⎯ ⎯ →<br />

D2,<br />

EVA ⎯⎯ ⎯ →<br />

D,<br />

EVA(<br />

i )<br />

⎯⎯⎯→ Ret<br />

dw<br />

=<br />

dt<br />

s<br />

Total<br />

EVA<br />

D1,<br />

EVA<br />

s<br />

⋅ S<br />

D2,<br />

EVA<br />

s<br />

Ret<br />

⋅ EVA<br />

⋅ S<br />

D,<br />

EVA(<br />

i )<br />

+<br />

*<br />

EVA<br />

⋅ S<br />

( 1−<br />

s<br />

+<br />

Ret<br />

( 1−<br />

s<br />

+ ( 1−<br />

s<br />

EVA(<br />

i )<br />

) ⋅G<br />

(D1,EVA))<br />

(D2,EVA)<br />

(D,EVA(i))<br />

(D,Ret)<br />

(D.5.1)<br />

(D.5.2)<br />

don<strong>de</strong> φ representa la concentración <strong>de</strong>l copolímero <strong>de</strong> EVA en la formulación binaria<br />

y cada uno <strong>de</strong> los términos diferenciales vienen dados por las ecuaciones D.1.1-5 y por<br />

la ecuación 6.19.<br />

+<br />

Ret<br />

Total<br />

dwRet<br />

⋅φ<br />

+ ⋅ ( 1 − φ)<br />

dt<br />

⎧⎡⎛<br />

dw ⎞ ⎛ dw *<br />

EVA<br />

EVA ⎞<br />

⎪⎢⎜<br />

⎟ + ⎜<br />

⎟<br />

⎪⎢⎝<br />

dt ⎠ D1,<br />

EVA ⎝ dt ⎠<br />

⎪⎢<br />

* ⎪⎢<br />

⎛ dwEVA<br />

⎞ ⎛ dSEVA<br />

⎞<br />

= ⎨⎢<br />

⎜<br />

⎟ + ⎜ ⎟<br />

⎪⎣⎝<br />

dt ⎠ 2,<br />

⎝ dt<br />

D EVA ⎠<br />

⎪<br />

⎡<br />

⎪ ⎛ dwEVA(<br />

i)<br />

⎞ ⎛ dS<br />

+ ⎢⎜<br />

⎟ + ⎜<br />

⎪<br />

⎩ ⎢⎣<br />

⎝ dt ⎠ , ( ) ⎝ dt<br />

D EVA i<br />

Total<br />

dwRet<br />

+ ⋅ ( 1 − φ )<br />

dt<br />

D1,<br />

EVA<br />

D2,<br />

EVA<br />

( 1 − s<br />

D1,<br />

EVA<br />

D 2,<br />

EVA<br />

EVA(<br />

i)<br />

) ⋅ G<br />

) ⋅G<br />

D1,<br />

EVA<br />

D,<br />

EVA(<br />

i)<br />

⎞<br />

⎟<br />

⎠<br />

⎤<br />

+ ⎥<br />

⎥<br />

⎥ ⋅<br />

⎥<br />

⎥<br />

⎦<br />

D,<br />

EVA(<br />

i)<br />

D2,<br />

EVA<br />

) ⋅G<br />

( 1 − α )<br />

D,<br />

EVA(<br />

i)<br />

⎫<br />

⎪<br />

⎪<br />

+ ⎪<br />

⎪<br />

⎬ ⋅φ<br />

+<br />

⎪<br />

⎤<br />

⎪<br />

⎥ ⋅α<br />

⎪<br />

⎥<br />

⎪<br />

⎦ ⎭

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