JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 30

resin
Tab. 3: Comparison of tensile properties in reinforced prepreg composites: AdvaliteTM hot-melt
resin system vs. bisphenol A epoxy resin

Mechanical property comparison (0/90 fabrics)
Property

35051-00 Epoxy

Tensile strength
(max. load)

GPa

439

416

Elongation
at break

%

3.7

2.4

Fibre fraction

%

64.9

64.8

epoxy resin system used in high-performance composite applications - both of
which show excellent tensile properties.
Fig. 1: Dielectric cure response of AdvaliteTM 35051-00 prepreg resin system versus time (sec.)

in automotive applications - in composites they are controlled by the part
moulding mechanics and the reaction
rate of the curing process. The curing
mechanism for these hot-melt resins is
the same as for the liquid vinyl hybrid
systems, i.e. the resin is combined with
a free-radical initiator and the cure is
achieved by activating the initiator to
start a vinyl addition polymerization.
As is the case with liquid vinyl hybrid
systems, AdvaliteTM hot-melt resins can
modify the gel time needed for moulding purposes while maintaining fast
cure. This is achieved by selecting the
appropriate initiators and inhibitors
without changing the polymer itself.
Figure 1 shows the dielectric cure
response of an AdvaliteTM 35051-00 formulated resin system used in a prepreg
application. The graph shows that at the
given moulding temperature (150°C),
the final cure of the laminate is achieved
in less than 75 seconds for a 3-mm-thick
laminate, allowing for press cycles that
meet a high-volume automotive production rate.
The optimization of mechanical properties is a key criterion to ensure that the
composite meets OEM specifications.
Mass reduction can also be obtained
through the use of materials with high
physical properties such as those used
in high-performance composites. Table

2 shows the properties of the AdvaliteTM hot-melt vinyl hybrid cast resins.
In this table, the cast resins again show
excellent flexural and tensile strength
and modulus. The table also shows that
the polymer backbone can be modified
to meet the applications' needs - the
ability to modify the Tg and elongation
values is given as an example of this
design flexibility. In addition, the hotmelt resin systems have shown comparable properties in reinforced prepreg
laminates as traditional epoxy resin systems used in similar applications. The
mechanical properties of composites are
provided in Table 3. This table shows
that the hot-melt vinyl hybrid resin is
comparable in terms of properties to an

The hot-melt vinyl hybrid resin system
has been proven in automotive applications as it was used in the GM 2014
Chevrolet Spark electric battery tray.
The performance requirements of this
application called for a high-performance composite material. These specifications encompassed a long-glass-fibre
prepreg composite capable of maintaining its package integrity after multiple
crash tests - including 30-degree offset,
side impact and rear barrier crash tests.
Because of the part's placement in the
vehicle, it was also critical that the part
exhibit zero emissions. The prepreg
manufactured with a hot-melt vinyl
hybrid resin met all of these stringent
requirements. The mechanical properties of a prepreg utilizing this type of
hot-melt vinyl hybrid resin system are

Tab. 2: Cast resin properties of AdvaliteTM hot-melt vinyl hybrids

Property

Unit

Flexural strength

X4833-37

X4710-16

MPa

155.9

130.4

Flexural modulus

GPa

3.53

4.22

Tensile strength

MPa

57.6

82.5

65.3

46.3

Tensile modulus

GPa

3.92

3.42

3.04

3.86

Elongation

%

1.6

4.0

2.5

1.3

HDT

C

94

84

116

151

Dry Tg

C

81

154

173

Wet Tg

C

149

157

Water absorption

%

1.5

0.7

Viscosity @ 100°C

poise

14

18

30 jec composites magazine / No91 August - September 2014

35000-00

18

35051-00

19



JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014

Cover
Edito
Point of view: growing perspectives
Contents
COMPANY & BUSINESS In Brief
Agenda of Events
APPLICATIONS
Bike
3D fabrics
MARKET
Wind energy
ROI
FEATURE AUTOMOTIVE
Resin
Design
CFRP
Natural fibres
Sustainability
Process
3D printing
View
RESEARCH & DEVELOPMENT
RTM
Hybrid structure
TECHNOLOGY & INNOVATIONS
Polyurethane
Simulation
Core Material
Index
In the world
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Cover
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 2
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Edito
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Point of view: growing perspectives
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 5
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Contents
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 7
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - COMPANY & BUSINESS In Brief
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 9
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 10
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 11
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Ad1
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 13
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Ad2
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Bike
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 15
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 3D fabrics
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 17
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 18
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Wind energy
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 20
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - ROI
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 22
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 23
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 24
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Resin
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 26
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 27
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 28
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 29
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 30
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 31
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Design
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 33
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - CFRP
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 35
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Natural fibres
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 37
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 38
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 39
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Sustainability
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 41
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Process
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 43
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 44
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 3D printing
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 46
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 47
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - View
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 49
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - RTM
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 51
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Hybrid structure
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 53
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 54
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 55
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 56
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Polyurethane
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 58
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 59
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Simulation
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 61
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 62
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Core Material
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 64
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - Index
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - In the world
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 67
JEC COMPOSITES MAGAZINE - Issue #91 - August/September 2014 - 68
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