WebAug 26, 2013 · Crystallinity affects optical transparency because of the scattering taking place when light passes from amorphous to crystalline regions: spherulites in i-PP are much larger than the wavelength of … WebSemi-crystalline or crystalline polymers are translucent or opaque as there are …

4.5: Crystallinity in Polymers - Chemistry LibreTexts

Crystallinity refers to the degree of structural order in a solid. In a crystal, the atoms or molecules are arranged in a regular, periodic manner. The degree of crystallinity has a big influence on hardness, density, transparency and diffusion. In an ideal gas, the relative positions of the atoms or molecules are completely random. Amorphous materials, such as liquids and glasses, represent an intermediate case, having order over short distances (a few atomic or molecular spacings) but n… WebApr 13, 2024 · Abstract. In inertial confinement fusion (ICF) experiments, high-density carbon (HDC) is being evaluated as an alternative to the current point-design ablator material (glow discharge plasma) due to its high density and optimal opacity, which leads to a higher energy efficiency and implosion stability. cucumber shampoo and conditioner

Gas Permeation and Barrier Properties of Liquid Crystalline

WebCrystallinity can range from 0 percent (entirely amorphous) to 100 percent (entirely crystalline), but most polymers fall somewhere between those extremes. Chain flexibility — both flexing along the entire chain and flexing in bonds between atoms — plays a big role in polymer crystal formation. Crystallization of polymers is a process associated with partial alignment of their molecular chains. These chains fold together and form ordered regions called lamellae, which compose larger spheroidal structures named spherulites. Polymers can crystallize upon cooling from melting, mechanical stretching or solvent evaporation. Crystallization affects optical, mechanical, thermal and chemical properties of the polymer. The degree of crystallinity is estimated by different analy… WebApr 7, 2024 · The opacity was calculated as follows : O p a c i t y = A 600 d (8) where A 600 is the absorbance at 600 nm and d is the film thickness (mm). The measurement was repeated five times for each sample. ... which suggested that the films were amorphous structures with sequentially decreasing crystallinity . Moreover, a comparison of the … cucumbers health benefits for women