JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 26
additive
Managing heat for
state-of-the-art composites
By
This article shows that there is a way to make thermoplastic
and thermoset parts thermally conductive while maintaining
electrical isolation by using boron nitride (BN) as an additive in
the resin.
Michael SoMMer
BuSineSS developMent Manager plaSticS,
grolMan
eat management is a major
challenge in many applications,
including electronics, aerospace
and automotive. Many solutions available today are based on metal conductors used in compound composites or
as heat sinks attached to parts that need
temperature control.
applications where devices have to be connected directly to the electric source or are
in direct contact with the user.
Previous investigations have demonstrated
the possibility of substituting aluminium
heat sinks with thermally-conductive
plastic composites using theoretical modelling approaches for simple geometries. For
more realistic heat sink geometries, finite
element analysis was used to determine the
steady-state temperature distribution.
Control of temperature
Specific powder grades
These solutions often consist of a metal
such as aluminium (which has a thermal
conductivity of 100 W/mK) or a composite filled with metal flakes, graphite or carbon black. One drawback in these cases is
that the parts are electrically conductive
too. Some solutions exist for creating
thermally-conductive and electricallyinsulating plastic parts; however the hardness of some of the
additives used can
damage the processing equipment or
tools.
Control of temperature in combination
with electrical insulation is a demand
Fig. 1: Boron nitride's
that arises from
Momentive Performance Materials Inc.
produces boron nitride (BN) and has
developed powder grades specifically for
use in plastics. The hexagonal crystal structure of BN, which is similar to carbon, is
also soft and lubricious, so that there is no
negative impact on processing equipment
or tools. And because it is white, BN allows
full colour freedom for the user. With these
unique properties,
BN can be the best
overall choice for use
in thermal management applications
where electrical insulation is also required.
H
structure
One typical application for BN-filled
plastics is LED lamps
26 jec composites magazine / No98 July - August 2015
for residential use. To enable the highest
efficiency of the LED chip, it needs to stay
cool. Early bulbs were manufactured with
a housing that included a plastic insert
around the LED bottom section and was
covered with a metal heat sink (Figure 2).
Using Momentive BN powder in a polymer, this multi-part, costly construction
can be redesigned using plastic as both the
Fig. 3: Temperature comparisons between
aluminium and BN-filled plastic heat sinks
Fig. 2: LED housing with metal heat sink and plastic insert
Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015
Cover
Edito
Point of view : business development
Contents
COMPANY & BUSINESS
In brief
Cluster
SME
Agenda of Events
APPLICATIONS
Sports & leisure
Safety
Sports & leisure
MARKET
Resins
FEATURE AUTOMOTIVE
Materials
Binder
Additive
CFRP
Epoxy
Hybrid polymer
QSP
CRTP
Rear axles
Tanks
Engines
RESEARCH & DEVELOPMENT
Fractography
Recycling
TECHNOLOGY & INNOVATIONS
Ancillary product
Vision system
Nano
Index
In the world
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Cover
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 2
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Edito
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Point of view : business development
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 5
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Contents
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 7
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - In brief
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Cluster
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - SME
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 11
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 12
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 13
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 15
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Sports & leisure
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Safety
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Sports & leisure
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Ad1
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Ad2
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 19
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Resins
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 21
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 22
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Materials
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 24
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Binder
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Additive
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 27
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 28
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 29
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - CFRP
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 31
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Epoxy
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 33
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Hybrid polymer
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 35
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - QSP
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 37
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 38
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - CRTP
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 40
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 41
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Rear axles
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Tanks
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Engines
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 45
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Fractography
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 47
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 48
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 49
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Recycling
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 51
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Ancillary product
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 53
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Vision system
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 55
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Nano
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - Index
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - In the world
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 59
JEC COMPOSITES MAGAZINE - Issue #98 - July/August 2015 - 60
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