polydispersity


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polydispersity

[¦päl·i·di′spər·səd·ē]
(chemistry)
Molecular-weight nonhomogeneity in a polymer system; that is, there is some molecular-weight distribution throughout the body of the polymer.
References in periodicals archive ?
The broadening and the decrease of the cold crystallization enthalpy are due to defects in the crystal lamellae and due to the higher polydispersity.
9 Count rate Polydispersity index Volume (kCps) (PDI) mean (nm) Nanomag[R]-D-spio 253.
The particle size of ArtN was significantly decreased compared with free artocarpin and the polydispersity was less than 0.
It is also clear that there is a good correlation between the glass transition temperature and the average molecular weights and polydispersity of the polymer, indicating that the noncrystallinity of the material increases with the average molecular weight and the dispersity of the chains size.
However, structural analysis of plasmonic nanoparticles still remains challenging; polydispersity and larger particle size often prevent the diffraction quality single crystals.
Table 1 summarized the results of polydispersity index obtained from GPC analysis.
Controlled radical polymerization can produce high yields of polymers with functional, non-terminated ends; high molecular weights; and low polydispersity.
In this study, our aims are to compare THPS and MAPS methods between themselves, and investigate the effect of temperature in MAPS method at different parameters such as reaction times, weight average molecular weight (M w ), polydispersity index (PDI), hydrodynamic radius (Rh), intrinsic viscosity ([e]) and Mark Houwink equation constant (a) of copolymers.
Comparative measurements of size and polydispersity of several insect viruses.
The z-average diameter and polydispersity index of the solid and liquid SEDDS was recorded using Zeta sizer Nano ZS90.
Most dendritic polymers must be prepared in a demanding multi-step synthesis in a classic organic approach, but the randomly cascaded-branched hyperbranched polymers are obtained in a typical polymer approach at the expense of polydispersity with regard to both molecular weight and branching structure.
In addition, this method is suitable for monitoring the competitive adsorption of an anionic and nonionic surfactant on latex particles and polydispersity of latex particles.