IPC-TM-650 EN 2022 试验方法--.pdf - 第315页
Figure 1 Cutaway view of vitre ous silica tube dilatometer IPC-TM-650 Number Subject Date Revision Page 2 of 3 5.2.2 Condition E-1/1 10. 5.3.4 Recommended standard reference materials: 5.2.3 Condition -40/23/50. 5.3 Cali…
Figure 1
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 2
2.4.24.1
Time
to
Delamination
(TMA
Method)
12/94
Ttme
—
A
Time
zero
Time
of
Time
of
(start
of
reversible
event,
irreversible
event,
isothermal
such
as
release
representing
temp)
of
moisture
or
specimen
stress
relaxation
delamination
the
isotherm
is
reached.
In
this
case,
the
temperature
at
the
time
of
failure
shall
be
recorded.
5.4
Report
5.4.1
Report
the
Time
to
Delamination
as
determined
in
5.3.
Report
the
time
at
which
any
other
plot
event
has
taken
place
which
was
not
determined
to
be
irreversible.
5.4.2
Report
the
configuration
of
the
sample
(e.g.,
whether
external
or
internal
foil
is
present).
5.4.3
Report
the
ramp
rate
and
isothermal
temperature
if
other
than
that
specified.
6.0
Notes
6.1
For
epoxy
laminates
and
similar
materials,
the
recom¬
mended
isothermal
temperature
is
260℃
[500°F].
For
polyim-
ides
and
other
high
temperature
materials,
the
isothermal
temperature
may
be
increased
to
288℃
[550°
F].
For
other
material
types,
consult
with
the
material
manufacturer.
6.3
The
Tg
of
the
material
may
be
obtained
from
this
test,
which
is
similar
to
Method
2.4.24.
It
should
be
noted
that
the
Tg
so
obtained
is
a
"first
pass"
value.
6.4
A
faster
ramp
rate
will
decrease
the
time
to
run,
provide
some
greater
distinction
between
materials,
and
provide
a
closer
equivalence
to
the
Thermal
Stress
test,
2.4.13.1
.
A
rate
of
100℃/minute
[212°
F/minute]
is
recommended
for
such
determinations.
6.2
Calibration
of
the
instrument
should
be
carried
out
according
to
the
manufacturer's
instructions.
Figure 1 Cutaway view of vitreous silica tube dilatometer
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 3
5.2.2
Condition
E-1/1
10.
5.3.4
Recommended
standard
reference
materials:
5.2.3
Condition
-40/23/50.
5.3
Calibration
5.3.2
The
temperature
sensor
shall
be
calibrated
according
to
an
appropriate
ASTM
method
(E-220)
or
procedure
recom¬
mended
by
the
National
Bureau
of
Standards.
•
OFHC
Copper;
GTE
1
7.3
PPM/℃
(for
use
with
“high
expansion"
materials)
5.3.3
The
dilatometer,
as
a
total
system,
shall
be
calibrated
by
measuring
two
reference
materials
of
known
thermal
expansion.
One
of
the
materials
should
have
an
expansion
close
to
the
sample
specimen,
and
the
other
close
to
that
of
the
dilatometer.
5.3.1
The
transducer
shall
be
calibrated
by
imposing
a
series
of
known
displacements
with
a
precision
screw
micrometer
or
set
of
end
gage
blocks.
•
NBS
Fused
Silica
-
SRM
739;
CTE
.55
PPM/℃
(for
cali¬
bration
of
dilatometer)
5.3.5
The
expansion
of
the
dilatometer
system,
(AL/LO)S,
and
the
calibration
constant,
for
corrections
of
lead
lag,
tem¬
peratures,
etc.,
are
determined
at
20℃
intervals
using
the
fol¬
lowing
equations:
(A^LO)S
=
(AULJ
-
(AULJm
•
NBS
Single
Crystal
Sapphire
-
SRM
732;
CTE
~
5.5
PPM/℃
(for
use
with
l1ow
expansion"
materials)
尚
「代）
s
A
=
2.4.41.1
A
Coefficient
of
Thermal
Expansion
by
the
Vitreous
Silica
(Quartz)
Dilatometer
Method
8/97
给
m
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 2
2.4.24.2
Glass
Transition
Temperature
of
Organic
Films
-
DMA
Method
7/95
6.3
In
general,
DMA
is
more
sensitive
that
DSC
or
TMA.
This
is
especially
important
for
high
temperature
polymers
with
weak
transitions.
6.4
If
the
polymer
decomposes
before
the
glass
transition
is
reached,
report
the
decomposition
temperature
and
indicate
that
it
is
a
decomposition
temperature
and
not
a
glass
transi¬
tion
temperature.