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Table 1 Adiabatic temperature rise and the cross-head speed of transition from isothermal to adiabatic conditions

From: Non-adiabatic heating of polymer films under drawing

Polymer

Drawing ratio,λ

V, mm min−1

α  =  Q/А(Godovsky1992)

ρ, kg m−3

c, J kg−1  K−1

χ, Wt m−1  K−1

Draw stress,σd, MPa

ΔT, °Ca

Vcb, mm/min

LDPE

5

60

0.85 ± 0.05

910

2,010

0.34

12

22

11

HDPE

5

60

0.85 ± 0.05

940

1,900

0.43

16

28

15

PP

6

60

0.93

925

1,930

0.15

23

49

10

PA-6

3.5

60

0.80 ± 0.05

1,130

1,500

0.15

45

53

7

PVC

3.7

20

0.7 to 0.83

1,400

1,200

0.165

23

26 to 31

6

PET

5.4

1.8

0.95 ± 0.05

1,130

1,330

0.14

47

135

14

PET

5.4

16

1.12 ± 0.05

1,130

1,330

0.14

41

138

14

PET

5.4

120

1.30 to 1.35

1,130

1,330

0.14

33

132

14

PET

6.5

1000

1.30 to 1.35

1,130

1,330

0.14

37

159

14

PC

2.3

0.9

0.95 ± 0.05

1,200

1,170

0.15

43

38

5

  1. aCalculated with Equation 6 for room temperature 22°C; bFor sample thickness 2 mm.