Table 12 Comparison of experimental and theoretical values (based on processing parameters and crystallinity, respectively) for crystallinity and mechanical properties of CF/PEEK after hot treatment.

From: The prediction of the effects of non-isothermal molding/reprocessing on the crystallinity and mechanical properties of PEEK and CF/PEEK

Processing Parameters (T, Φ)

Xc (%)

A = Exp. B = Theo.

 

E1 (GPa)

E2 (GPa)

v12

v23

G12 (GPa)

G23 (GPa)

σb1 (MPa)

σb2 (MPa)

Ï„12 (GPa)

360 (°C),

1 (°C/min)

48.55 (A)

49.47 (B)

1.89%

(Error)

Exp.

131.22

6.99

0.22

 

4.33

 

2296.55

92.79

107.31

Theo. (T, Φ)

135.40

6.66

0.24

0.30

4.00

2.58

2199.71

96.24

109.49

Error (%)

3.18

4.72

9.09

 

7.62

 

4.22

3.72

2.03

Theo. (Xc = A)

135.37

6.57

0.23

0.30

4.01

2.56

2202.33

98.45

113.48

Error (%)

3.16

6.01

4.55

 

7.39

 

4.10

6.10

5.75

Theo. (Xc = B)

135.37

6.59

0.23

0.29

4.03

2.57

2203.31

99.43

115.23

Error (%)

3.16

5.72

4.55

 

6.93

 

4.06

7.16

7.38

Theo. (Xc−PEEK)

135.35

6.52

0.24

0.31

3.96

2.52

2199.87

95.88

108.99

Error (%)

3.15

6.72

9.09

 

8.55

 

4.21

3.33

1.57

360 (°C),

500 (°C/min)

26.09 (A)

26.24 (B)

0.57%

(Error)

Exp.

131.19

5.91

0.28

 

3.61

 

2281.89

60.99

69.34

Theo. (T, Φ)

135.04

5.65

0.30

0.42

3.32

2.09

2179.97

65.10

64.03

Error (%)

2.94

4.40

7.14

 

8.03

 

4.47

6.74

7.66

Theo. (Xc = A)

135.00

5.55

0.29

0.41

3.36

2.06

2180.67

67.28

67.70

Error (%)

2.91

6.09

3.57

 

6.93

 

4.44

-10.31

2.37

Theo. (Xc = B)

135.01

5.56

0.29

0.41

3.36

2.07

2180.80

67.53

68.02

Error (%)

2.91

5.92

3.57

 

6.93

 

4.43

10.72

1.90

Theo. (Xc−PEEK)

134.96

5.44

0.30

0.41

3.30

2.01

2179.33

64.57

64.31

Error (%)

2.87

7.95

7.14

 

8.59

 

4.49

5.87

7.25

360 (°C),

1800 (°C/min)

18.91 (A)

17.11 (B)

9.52%

(Error)

Exp.

131.00

5.14

0.34

 

3.17

 

2269.34

49.12

50.15

Theo. (T, Φ)

134.77

4.87

0.31

0.45

3.02

1.79

2173.92

51.69

48.71

Error (%)

2.88

5.25

8.82

 

4.73

 

4.20

5.23

2.87

Theo. (Xc = A)

134.81

4.97

0.31

0.44

3.07

1.82

2174.74

54.34

51.97

Error (%)

2.91

3.31

8.82

 

3.15

 

4.17

10.63

3.62

Theo. (Xc = B)

134.79

4.81

0.32

0.45

2.99

1.75

2173.33

50.88

47.94

Error (%)

2.90

6.42

5.88

 

5.68

 

4.23

3.58

4.41

Theo. (Xc−PEEK)

134.76

4.70

0.32

0.46

2.94

1.71

2172.47

48.67

45.42

Error (%)

2.87

8.56

5.88

 

7.26

 

4.27

0.92

9.43

400 (°C),

500 (°C/min)

21.98 (A)

23.25 (B)

5.78%

(Error)

Exp.

130.39

5.52

0.32

 

3.43

 

2267.23

56.31

56.46

Theo. (T, Φ)

134.82

5.02

0.29

0.40

3.11

1.87

2176.79

60.10

58.53

Error (%)

3.40

9.06

9.38

 

9.33

 

3.99

6.73

3.67

Theo. (Xc = A)

134.90

5.24

0.30

0.43

3.19

1.93

2177.22

60.05

58.76

Error (%)

3.46

5.07

6.25

 

7.00

 

3.97

6.64

4.07

Theo. (Xc = B)

134.93

5.34

0.30

0.42

3.25

1.97

2178.27

62.33

61.55

Error (%)

3.48

3.26

6.25

 

5.25

 

3.92

10.69

9.02

Theo. (Xc−PEEK)

134.84

5.22

0.30

0.43

3.18

1.92

2177.01

59.59

58.21

Error (%)

3.41

5.43

6.25

 

7.29

 

3.98

5.82

3.10

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