Percent crystallinity

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...crystallinity for two polytetrafluoroethylene materials are as follows: (a) Compute the densities of totally crystalline and totally amorphous polytetrafluoroethylene. (b) Determine the percent...
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In pure cellulose samples, the percentage of cellulose hydrolysis was inversely proportional to the degree of crystallinity. For the loblolly pine samples, the extent of hydrolysis was low for the fraction with 74- to 149- µm particle size, but the ball-milled fraction was hydrolyzed easily.
In addition to estimating percent crystallinity (PC), our methodology is capable of revealing additional information, such as interchain interactions in crystal lattice, that in principle will help distinguishing polymorphic transformations, subtle changes in lamellar lattice dimensions, and other phase changes in polymers. The latter serves as a model system which describes the thermal and mechanical behaviour of polymers with crystallinities in the region of 15%. A second model system is the polymer formed by addition of chlorine to poly (1,4-butadiene). This is head-to-head PVC and completely amorphous.
We provide key raw materials for the formulation of coatings and paints, printing and packaging products, construction chemicals, adhesives, fiber bondings, plastics, paper, and more ...
Its crystallinity varies from amorphous to fairly high crystalline; it can be highly transparent and colourless but thicker sections are usually opaque and off-white. It is widely known in the form of biaxially oriented and thermally stabilised films usually referred to by their main brand names Mylar, Melinex or Hostaphan. Jan 23, 2018 · Of the commonly used commercial polymers, high-density polyethylene (HDPE) achieves the highest degree of crystallinity; and even in this instance, the level rarely exceeds 85 percent, even for the highest density grades. For many semi-crystalline polymers, the typical degree of crystallinity is less than 50 percent.
The percentage of heat of enthalpy, which is directly corelated to percentage of crystallinity, of PVDF-TrFE was increased by 6.5% when annealed at 120°C and by 50% with the addition of BNNT 1 wt.% compared to PVDF-TrFE as-received.
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