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en:materialdaten:thermodynamische_daten [2025/05/15 14:10] – cschallen:materialdaten:thermodynamische_daten [2025/05/27 16:13] (aktuell) – neelest
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 \[c_p(T) = c_{p,0} + c_{p,m}\cdot T\] \[c_p(T) = c_{p,0} + c_{p,m}\cdot T\]
- 
-can be described. 
  
 The peak in the curve for semi-crystalline thermoplastics describes the temperature $T_K$ and thus the melting temperature. The peak in the curve for semi-crystalline thermoplastics describes the temperature $T_K$ and thus the melting temperature.
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 This gives the amount of heat related to the unit mass that is required to increase the temperature of the polymer from $T_1$ to $T_2$. This gives the amount of heat related to the unit mass that is required to increase the temperature of the polymer from $T_1$ to $T_2$.
  
-Semi-crystalline materials, on the other hand, exhibit a gradual increase due to the phase transformation. The additional amount of heat is referred to as the melting enthalpy $∆h_A$. The following figure shows the specific enthalpy as a function of temperature. +In contrast, semi-crystalline materials exhibit a step-like increase due to the phase transition. The additional amount of heat is referred to as the melting enthalpy $∆h_A$. The following figure shows the specific enthalpy as a function of temperature.
  
 {{ :materialdaten:abb_enthalpie_en.svg?nolink&700 |}} {{ :materialdaten:abb_enthalpie_en.svg?nolink&700 |}}
  
-With indicating **amorphous thermoplastics** the field for melting enthalpy is not +When specifying an **amorphous thermoplastic**, the field for the melting enthalpy is not editable. For **semi-crystalline thermoplastics**, the enthalpy increase $∆h$ consists of the enthalpy increase of the solid phase $∆h_F$ and the melting enthalpy $∆h_A$:
-editable. In case of **semi-crystalline thermoplastics** the increase in enthalpy $∆h$ is +
-formed by an enthalpy increase of the solid material $∆h_F$ and the melting enthalpy +
-$∆h_A$ : +
  
-Amorphous thermoplastics: \[∆h=∆h_F\]+Amorphous thermoplastics: \[∆h_{T_G}=∆h_F\]
  
-Semi-crystalline thermoplastics: \[∆h=∆h_F+ ∆h_A\]+Semi-crystalline thermoplastics: \[∆h_{T_K}=∆h_F+ ∆h_A\]
  
 Plus the enthalpy increase in the melting range: $$∆h_{melt}=\frac{1}{2} c_{p,m} \cdot (T^2-{T_{K,G}}^2) + c_{p,0} \cdot (T-T_{K,G})$$ Plus the enthalpy increase in the melting range: $$∆h_{melt}=\frac{1}{2} c_{p,m} \cdot (T^2-{T_{K,G}}^2) + c_{p,0} \cdot (T-T_{K,G})$$