Table 4 Five different gradations and their bulk densities.

From: Theoretical characterization of mesoscopic structure of PBT propellant based on liquid film thickness

Filler

 

AP

 

Al

\(\:\varnothing\:\)

di (µm)

10

150

380

29

 

Gradation 1

mi (%)

vi (%)

3

48

6

18

0.734

3

43

5

12

Gradation 2

mi (%)

6

34

17

18

0.757

vi (%)

5

31

15

12

Gradation 3

mi (%)

9

40

8

18

0.761

vi (%)

8

36

7

12

Gradation 4

mi (%)

10

20

27

18

0.786

vi (%)

9

18

24

12

Gradation 5

mi (%)

10

9

38

18

0.797

vi (%)

9

8

34

12