In Narimissa and Wagner [3,4] we extended the HMMSF model to monodisperse, bidisperse, and polydisperse linear polymer
melts by means of relating the relaxation times to the Rouse stretch-relaxation times for each relaxation mode.
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 architecture (ref.
Although the molecular weight of star-shaped polymers is much higher than that of the others, the injection pressure is similar to that of M0-4000 linear polymer
, and the injection ability is good.
The multivalent linear polymer
precursor poly(HPMA-co-Ma-ah-NHN[H.sub.2]) (P4) containing hydrazide groups randomly distributed along the polymer chain, which are intended for drug attachment, was prepared by free radical copolymerization using AIBN as the initiator, as previously described .
This approach is familiar for linear polymer
chains and is generalized here to branched polymers.
Linear low density polyethylene refers to a linear polymer
containing several short branches and formed by the copolymerization of ethylene.
Polyrotaxanes consist of a linear polymer
threaded through a series of unattached cyclic molecules.
In a recent Canadian case involving polyethylene polymers, the judge had to construe the following terms: "ethylene polymer composition," "comprising," "homogenously branched," "heterogeneously branched," "linear," "substantially linear," "slope of strain hardening coefficient" and "linear polymer
fraction." While such terms may be well known to polymer chemists, these are not your average everyday phrases.
For example, in works [11,12] thermal degradation of high-molecular linear polymer
(on the example of polyethylene) is considered.
The molar weight distribution of the linear polymer
samples was investigated by the gel permeation chromatography (GPC) with N,N'-dimethylformamide as the solvent.
Even though polydimethylsiloxane is a linear polymer
, just as is this polystyrene standard, the molar masses at the same elution time are not identical for the two polymers.