These approaches include: lowering the molecular weight, increasing the fatty acid amount, building a highly branched polymer
structure, and focusing on a narrow molecular weight distribution.
It is known that a Lissajous plot showing secondary loops is indicative of a linear polymer architecture, while the absence of secondary loops is characteristic of a branched polymer
Finally, relaxation time spectra (RTS) are used to gain a further insight into the entanglement structure of the branched polymer
. As relaxation processes determine the material functions, the relaxation time spectra can highlight information of the entanglement structure which might be attenuated in case of dynamic-mechanical data [38, 39], Nevertheless, as also noted by Stadler , a spectrum does not contain more information than the material function it is calculated from.
Many of the chemistries that are used for branched polymer
production are difficult to perform.
becomes more and more concerned because of its unique structural characteristics and properties, now its development is one of the fastest in macromolecular materials.
IR spectra of PE-BIO show a single peak at 700-750 [cm.sup.-1] and at 1440-1490 [cm.sup.-1] because it is a linear polymer, while for LDPE these same bands are bifurcated due to being a branched polymer
. See Figures 2(a) and 2(b).
The [sup.1]H NMR spectrum of the final boron comprising branched polymer
, PEGME550-B, is presented in Figure 2.
The form factors for a few branched polymer
systems are discussed here.
Steven Zimmerman, professor of chemistry, says that the team's accomplishment is the first example of molecular imprinting in which a single molecular template is imprinted into a single macromolecule--a highly branched polymer
called a dendrimer.
All dendrimers have highly branched polymer
The fist, the binary nanosystem Polymer/AgNPs was synthesized in anionic branched polymer
PPG Industries has received a patent for a compound that is comprised of the reaction product of a highly branched polymer
having terminal amine functional groups and a lactam, wherein the highly branched polymer
is the step-growth polymerization reaction product of a polyfunctional first monomer having a first functional group and a polyfunctional second monomer having a second functional group wherein the first and second functional groups will react with each other but not themselves, wherein formation of the highly branched polymer
is free of self-condensation of the polyfunctional first monomer, and free of self-condensation of the polyfunctional second monomer.