ChemInform Abstract: Biodegradable Starch‐Based Polymeric Materials

Abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Chitosan‐based hydrogels: recent design concepts to tailor properties and functions

“…Negatively charged macromolecules, anionic polysaccharides (such as alginate or carboxymethylcellulose) or synthetic polymers containing carboxylic groups (poly(acrylic acid), poly(methacrylic acid), poly( N ‐acryloylglycine)), can also give rise to CS hydrogels through polyelectrolyte complex (PEC) formation. In polyelectrolyte complexation, the entities reacting with CS being polymers, chain entanglements or additional hydrophobic/hydrophilic interactions can be added to the ionic bridges to increase the elastic properties of the networks.…”

Phase equilibria and phase structures of polymer blends

“…In this case, the position of the critical point, as expected, is shifted to the middle of the composition region. It should be noted that a phase diagram reported in the studies 22,67 for the same system but with another ratio between the molecular weights of the components has both a binodal and a liquidus line (Fig. 15).…”

“…For example, it was found 67 that a change in the composition by 20% led to depression of 10 ± 15 K, whereas this value was estimated at 1 ± 5 K in the studies. 22,87,88 The estimates of w obtained from these data in the context of the approach proposed by Nishi and Wang 84 demonstrate a scatter from 75.0 to 70.5, which cannot evidently be ignored.…”

“…, 87 (4), 89 (5), 22 (6). 67 The equilibrium in the poly(butylene terephthalate) (PBTF) ± liquid cristalline polyether (PET) system belongs to complex equilibria (Fig.…”

Rheological Properties of Blends of Ternary Copolyamide 6/66/610 with Chitosan

“…Previously, we have shown [7] that SPA forms homogeneous blends with starch in the presence of plasticizers (glycerol and water) providing the compatibility of the polymers (so-called compatibilizers). The similarity between the rheological properties of these blends and those of common synthetic polymers makes these mixtures promising for practical applications.…”