g] and [[eta]] will result for a long chain branched polymer
compared with its linear counterpart of the same MW.
Homogeneous long-chain branched polymer
can have benefits for collapse resistance (high low shear viscosity) and easy dispersion mixing (low high shear viscosity) to result in excellent extrusion processability (fast throughput and minimal melt fracture) which leads to higher surface quality and product consistency.
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.
n] is calculated from the ratio of intrinsic viscosity of the branched polymer
fraction (having random, trifunctional polydisperse structure) to the corresponding linear polymer fraction.
The major active ingredient of most chemical peptizers is DBD, which acts to terminate the broken chains before they can react to form branched polymer
One of the ways to calculate the MWD for branched polymer
is numerical fractionation, where the whole polymer population is classified into number of classes based on the number of branches  (e.
The new molecule - a lacy, branched polymer
known as a dendrimer - has a precisely defined structure and can be produced in surprisingly uniform batches, says Jeffrey S.
For both Miles and Hoechst Celanese, toughness is one advantage of polymerization processes that produce a more linear rather than branched polymer
However, in branched polymers
, the reptation of molecules is inhibited by the presence of branch points; hence, branched polymer
chains relax by fluctuations and constraint release (16).
The possible reason could be that branched polymer
is denser than linear polymers, and hence, has lower volume fraction of free space per unit volume of the polymer, which reduces the survival rate of micro voids, and therefore, impedes nucleation.
Note that a branched polymer
is exceptional in that which can simultaneously have enhanced melt tension while still exhibiting shear thinning (27).
6] Da and the highly branched polymer
called amylopectin with an average molecular weight of [10.