polydispersity


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polydispersity

(ˌpɒlɪdɪˈspɜːsɪtɪ)
n
(Chemistry) chem the state of being polydisperse
References in periodicals archive ?
The polydispersity index (PDI) of the recycled PET is narrower than that of the raw material and the quality of recycled PET fiber is comparable to that made from bottle flakes for the purpose of filling.
The characterization of colloidal silver dissolved in water and cell culture medium was analyzed by dynamic light scattering (DLS); colloidal silver dissolved in water showed an average size of 100 nm with a polydispersity index of 0.2; colloidal silver dissolved in cell culture medium showed an average size of 155 nm and polydispersity index of 0.23 (Figures 1(a) and 1(b)).
The actual molecular weight distributions can be further documented by using gel permeation chromatography (GPC) or size exclusion chromatography (SEC) to evaluate the molecular weight parameters (molecular weight averages and polydispersity, for example).
Instead of the traditional ESCR test, he uses the polydispersity index determined by melt theology, which is related to ESCR.
Conventional synthesis of alkyd resins leads to polycondensates with a rather high polydispersity, in which case the high molecular-weight part contributes to a high intrinsic viscosity, and the low molecular-weight part has a negative impact on drying properties.
The instruments are suited for users performing rapid characterization of size and polydispersity. The range incorporates the automated DynaPro Titan Plate Reader, making the technology available for the rapid screening of unfractionated samples for applications such as crystallography and aggregation studies.
Surprisingly, we found that SAA polyols also reduced the polydispersity of alkyd resins while maintaining their molecular weight (Mn).
The purpose of this study is to evaluate the influence of the number average molecular weight of the amorphous component ([Mn.sub.ps]), its polydispersity and its weight fraction ([w.sub.PS]), at different crystallization temperatures ([T.sub.c]), on the segregation morphology in blends of PCL/PS.
The acoustic density entering the system and the influence of the latter on spirooxazine nanocapsules' shape, average size, and polydispersity index (PDI) were systematically studied.
Gregory Sawyer, University of Florida; "Effect of polydispersity on the properties of 1,4-polybutadiene," C.
The molecular weights and polydispersity index (P.I) of all polymers were determined by using gel permeation chromatography (GPC).