4 Hybrid Composite Fiberglass Structure with Embedded …
39
Fig. 4.3 Hybrid composite fiberglass with various percentage of aluminum phosphate (0, 5, 10%)
in samples A (3-layer CSM), B (3-layer WR) and C (CSM, WR, CSM) (a) Image of vertical burning
sample; Vertical burning at (b) 10 s, (b) 20 s and (c) 30 s vertical burning test
Table 4.4 Vertical burning
Sample type
3 layers CSM
3 layers WR
CSM, WR, CSM
Aluminum phosphate ratio
0
5
10
0
5
10
0
5
10
t1 (10 s)
Self-extinguishing
No
No
No
No
No
No
No
No
No
Burn length
21
17
15
32
26
20
30
25
19
t2 (20 s)
Burn length
29
35
29
49
35
30
46
30
27
t3 (30 s)
Burn length
56
50
40
55
45
37
54
42
32
1. Samples with 5 wt% of aluminum phosphate produced the highest values of
tensile strength, flexural strength, flexural modulus, Brinell hardness and impact
strength, except in tensile modulus.
2. Samples C with combinations of three layers CSM and WR produced the highest
values mechanical data in flexural strength, flexural modulus and impact.
3. Samples C with a combination of CSM and WR produced the highest mechanical
properties and fire retardant due to good interaction between the fiberglass, resin
and aluminum phosphate additive compared to three layers CSM and three layers
WR.