Chemistry Reference
In-Depth Information
O
C
OH
CO
O
H
+
HOCH
2
C
CH
2
OH
C
O
O
CH
3
Δ
CH
3
O
OC
O
HC
−
H
2
O
H
C
OCH
2
C
CH
2
C
HC
C
O
C
C
CH
3
O
O
C
H
O
(−i)
CH
3
O
HH
OC
O
Depict
By
C
Unsaturated
polyester
C
H
COCH
2
C
CH
2
O
C
C
CO
C
O
CH
3
O
H
H
C
CH
2
HC
H
H
C
CH
2
CH
2
CH
2
C
CH
HC
C
C
H
H
H
C
CH
2
C
C
H
C
H
H
CH
2
CH
2
CH
C
(−ii)
H
C
H
C
H
C
C
CH
2
CH
2
C
C
H
C
CC
CH
2
H
H
H
CH
HC
H
C
H
H
C
H
C
2
CH
HC
H
CC
HC
H
CH
2
HC
FIGURE 5.5
Schematic representation of the production of an unsaturated polyester resin and sub-
sequent cross-linking by polymerizing the styrene in a mixture of this monomer with the
polyester.
unsaturated linkages in the polyester. Boats and car bodies are among the pro-
ducts made by this process.
In glass
polyester products typical values of
the parameters mentioned
70 GNm
2
2
, Y
P
5
3.5 GNm
2
2
,
10
3
kg m
2
3
,
above are Y
F
5
ρ
F
5
2.6
ρ
P
5
1.15
3
3
10 kg m
2
3
, and w
F
5
0.6. Then, from
Eq. (5-40)
, the polymer will bear about 8%
of the load taken by the glass fibers.
Equation (5-40)
is equivalent to:
Y
F
A
F
1
Y
P
A
P
Y
C
5
Y
F
φ
F
1
Y
P
1
2
φ
F
(5-41)
5
A
C
