(c) After initial imaging, place the samples in containers above
a LiCl (14.3 Æ 0.5% RH) saturated salt solution for
storage.
(d) Image samples and determine their mass (to monitor crystal formation and EMC) every 30 min for the first 2 h in
storage, then every hour for the next 2–5 h, and once
a day.
2. Scanning White Light Interferometry.
(a) Measure sample thickness using a Zygo Nexview scanning
white light interferometer. Store LAD samples in containers above a LiCl (14.3 Æ 0.5% RH) saturated salt solution.
(b) Measure sample surface profiles after 1 day of storage and
then again after 27 days of storage.
(c) Measure EMC just prior to all SWLI measurements.
Export the data into MATLAB and HDFView for further
processing. In MATLAB transverse height can be displayed as a color map across the sample, the average
maximum height of the sample was calculated, and two
diagonal cross sections can be extracted.
3. Raman Spectroscopy.
(a) Acquire Raman spectra using a confocal Raman microscope. Use a 532 nm laser as the excitation source. The
laser power ($16 mW of full power) can be attenuated
using built-in attenuators. Collect Raman spectra at six
separate locations across each sample.
(b) Acquire Raman spectra of LAD 1 day after LAD processing. Store samples in containers above a LiCl
(14.3 Æ 0.5% RH) saturated salt solution, and collect
Raman spectra during storage.
4 Notes
1. No storage study was conducted in this research; therefore, no
predicted T g value was assessed.
2. A polyethylene syringe filter holder (Millipore, Billerica, MA)
of 13 mm diameter was used for drying. These devices were
reusable and can be autoclaved between uses. A turntable made
from ultrahigh molecular weight polyethylene (UHMWPE;
Grainger, Lake Forest, IL) was designed for processing of
multiple samples, total 12 samples at a time (eight positions
on the outer ring and four positions on the inner ring). In our
studies, only eight positions on the outer ring were used for
drying samples to avoid the influence of sample position on the
drying rate and the end moisture content of samples [33].
218
Shangping Wang et al.
a LiCl (14.3 Æ 0.5% RH) saturated salt solution for
storage.
(d) Image samples and determine their mass (to monitor crystal formation and EMC) every 30 min for the first 2 h in
storage, then every hour for the next 2–5 h, and once
a day.
2. Scanning White Light Interferometry.
(a) Measure sample thickness using a Zygo Nexview scanning
white light interferometer. Store LAD samples in containers above a LiCl (14.3 Æ 0.5% RH) saturated salt solution.
(b) Measure sample surface profiles after 1 day of storage and
then again after 27 days of storage.
(c) Measure EMC just prior to all SWLI measurements.
Export the data into MATLAB and HDFView for further
processing. In MATLAB transverse height can be displayed as a color map across the sample, the average
maximum height of the sample was calculated, and two
diagonal cross sections can be extracted.
3. Raman Spectroscopy.
(a) Acquire Raman spectra using a confocal Raman microscope. Use a 532 nm laser as the excitation source. The
laser power ($16 mW of full power) can be attenuated
using built-in attenuators. Collect Raman spectra at six
separate locations across each sample.
(b) Acquire Raman spectra of LAD 1 day after LAD processing. Store samples in containers above a LiCl
(14.3 Æ 0.5% RH) saturated salt solution, and collect
Raman spectra during storage.
4 Notes
1. No storage study was conducted in this research; therefore, no
predicted T g value was assessed.
2. A polyethylene syringe filter holder (Millipore, Billerica, MA)
of 13 mm diameter was used for drying. These devices were
reusable and can be autoclaved between uses. A turntable made
from ultrahigh molecular weight polyethylene (UHMWPE;
Grainger, Lake Forest, IL) was designed for processing of
multiple samples, total 12 samples at a time (eight positions
on the outer ring and four positions on the inner ring). In our
studies, only eight positions on the outer ring were used for
drying samples to avoid the influence of sample position on the
drying rate and the end moisture content of samples [33].
218
Shangping Wang et al.