In addition, a higher degree of
crystallinity is associated with higher strength and stiffness.
The molecular weight distribution of a PEEK resin affects the
crystallinity [26, 29], crystallization kinetics [37-41], rheology [29, 37, 41], and mechanical properties [41-43], but few studies have reported the molecular weight distribution of commercial PEEK resins.
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.
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.
Among the treated fibers FT1 exhibits higher degradation temperature as compared to FT2 due to its higher
crystallinity index (CrI).
The
crystallinity of PLA was enhanced by 114%, and the increase in
crystallinity of PLA/PHO blend was 274%, indicating a strong nucleation effect.
Carbon fiber precursors produced by using the optimal conditions could obtain the highest
crystallinity of 36.
Since these spectroscopic techniques are based on surface reflectance or absorbance, they are usually applied to films or thin samples (less than 2 mm) for which surface
crystallinity is known to be representative across sample thickness (Pantani et al.
2] These materials were used because of their well characterized properties, including
crystallinity and particle size.
The team also addressed TPO's less-than-stellar scratch resistance performance by modifying the material to have a higher surface
crystallinity, which places it on par with the touchstone for such applications: polycarbonate ABS.
Their
crystallinity also makes them more chemically durable
This section includes: density, molecular weight and molecular weight distribution,
crystallinity, thermal properties, mechanical properties, electrical properties, optical properties, surface properties, hardness and scratch resistance, abrasion resistance, friction, acoustic properties, degradation, biological behaviour, biocompatibility, wear, molecular properties, performance in service, permeability, and crosslinking.
