After melting, PET can end up being amorphous, or crystallized with a low crystallinity
of 10%--15%, or crystallized with a medium crystallinity
Larger changes in volume correspond in part to the achievement of a greater degree of crystallinity
. It is apparent that this change in volume becomes smaller as the applied pressure increases.
Afterward, an FTIR spectrometer (Impact type 410, USA) and X-ray diffractometer (XRD-TTR3, Japan) were used to analyze the functional groups and the degree of cellulose crystallinity
, respectively, of the treated and untreated samples.
tends to decrease with increasing molecular weight, that is typical for semicrystalline polymers.
For this study, 100 % cotton fabric of 110*110/ 60*60 was used and analysed in reference to crystallinity
and tensile strength by using X-ray diffractometer and tensile strength tester.
Figure 2 exhibited, the untreated fibers having the least crystallinity
index of 65.5% whereas it was improved in treated fibers to 74.4% and 72.87% in FT1 and FT2, respectively.
Beyond a minimum threshold of [Sr.sup.2+] inclusion, the crystallinity
decreased, whereas with [Mg.sup.2+] incorporation, the transformation of HAP into [beta]-TCP occurred.
of PLA was enhanced by 114%, and the increase in crystallinity
of PLA/PHO blend was 274%, indicating a strong nucleation effect.
This indicates that the crystallinity
of CIGS films is better at higher annealing temperatures.
The optical transparency in semicrystalline polymers is mainly related to the crystallinity
and to the surface properties .
As showed in table 1, four curing factors such as hydrochloric acid concentration, heating rate, curing temperature and curing time were selected to be optimized by using aL 16 (44) orthogonal table in term of the crystallinity
of carbon fiber precursors.
Several methods are currently used to determine polymer crystallinity
, but most of these measurements are performed off-line, are destructive, and provide single point measurements.