Formulating Polypropylene with Desired Mechanical Properties through Melt Compounding of Homopolymer and Impact Copolymer
Table 1
The mechanical properties of HPP, ICPP, and the ICPP and HPP mixtures.
Copolymer (wt.%)
Tensile properties
Flexural properties
Impact strength (kJ/m2)
Melt flow index (g/10 min)
MOE (MPa)
strength (GPa)
Strain (%)
MOE (GPa)
Strength (MPa)
Notched
Unnotched
0
1.58
Aa
32.5
A
9.95
A
1.68
A
52.5
A
1.62
E
55.4
B
15.9 ± 0.03b
D
20
1.50
B
29.9
B
8.62
B
1.58
B
49.9
B
1.67
E
62.0
B
16.5 ± 0.06
C/D
40
1.52
B
28.5
C
7.51
C
1.59
B
48.9
B
2.57
D
72.2
B
17.0 ± 0.04
C
60
1.45
C
25.2
D
5.87
D
1.48
C
44.4
C
3.76
C
92.5
A
19.4 ± 0.03
B
80
1.45
C
24.7
D
5.60
D
1.55
C
43.3
C
4.22
B
102
A
20.8 ± 0.04
A
100
1.34
D
19.9
E
4.77
E
1.35
D
38.2
D
4.82
A
102
A
19.9 ± 0.02
B
aThe letters A, B, C, D, and E represent the significant levels in statistical analysis. The values with different letters are significantly different. bStandard deviation.
