BMWD

(redirected from Broad Molecular Weight Distribution)
AcronymDefinition
BMWDBexar Metropolitan Water District (San Antonio, TX)
BMWDBerrenda Mesa Water District (est. 1963; Bakersfield, CA)
BMWDBroad Molecular Weight Distribution (materials engineering)
BMWDBangor-Monitor Water District (Bay County, Michigan)
References in periodicals archive ?
Combined with a broad molecular weight distribution, its low molecular weight is also responsible for its unusually low viscosity at higher temperatures.
Thus, the range of between 0.6 and 0 describes materials of different strain softening or hardening characteristics [14], Low-density (branched) polyethylenes can be fitted by values of = 0.13-0.20 and other polymers with broad molecular weight distribution seem to be fit by values of [xi]' =0.13-0.60 [13],
It has a melt flow rate (MFR at 2,16 kg) of 2 g/10 min, and its broad molecular weight distribution ensures very good behaviour during extrusion and blowing.
It has a melt flow rate (MFR at 2,16 kg) of 2g/10 min, and its broad molecular weight distribution reportedly ensures very good behaviour during extrusion and blowing.
The broad molecular weight distribution POE-WSR materials possess a high degree of pseudoplasticity, which is exhibited by their pituitous nature and reduction of viscosity upon exposure to shear.
It is considered that the limited molecular weight and broad molecular weight distribution of branched polymers mainly come from the primary chain residue [26].
17 in Table 3) also represents broad molecular weight distribution. Although almost no polymerization activity was observed with 10 [mciro]mol-Zr/g-catalyst of (nBuCp)[.sub.2]Zr[Cl.sub.2] in Expt.
However, BR-1 shows exceptionally high branching and/or broad molecular weight distribution to facilitate the easy processing and also to get the advantage of a linear polymer.
These results prove that the dynamic crosslinking method of ethylene-octene copolymers is an effective and original way to produce new hyperbranched molecular structure with a broad molecular weight distribution. Moreover, it was proved in the literature [31, 32] that the presence of hyperbranched structure or a small amount of crosslinked polymer imbedded in linear polymer considerably enhanced strain hardening behavior in the elongation viscosity.
Ziegler-Natta catalyzed polyethylene has a broad molecular weight distribution ([M.sub.w]/[M.sub.n] generally exceeding 4) and a wide short side-chain distribution.
Polymer C has a relatively high degree of branching, and has a broad molecular weight distribution.
The study makes it possible to propose a number of formulations based on DCPD types (broad molecular weight distribution) and these will be compared in a subsequent study with sulphur, sulphur donor and peroxide curing, which will be reported elsewhere.