Journal of Macromolecular Science-reviews in Macromolecular Chemistry and Physics 

About: Journal of Macromolecular Science-reviews in Macromolecular Chemistry and Physics is an academic journal. The journal publishes majorly in the area(s): Polymerization & Polymer. Over the lifetime, 112 publications have been published receiving 6379 citations.

Chemical and Physical Structure of Polymers as Carriers for Controlled Release of Bioactive Agents: A Review

Abstract: In a controlled release system a drug, pesticide, or other bio-active agent is incorporated into a carrier, generally a polymeric material. The rate of release of the substance is determined by the properties of the polymer itself and is only weakly dependent on environmental factors (such as the pH of bodily fluids). Controlled release systems are capable of delivering substances slowly and continuously for up to several years.

A review of high resolution liquid 13carbon nuclear magnetic resonance characterizations of ethylene-based polymers

Abstract: The use of 13 carbon nuclear magnetic resonance (NMR) spectroscopy in the molecular characterization of macromolecules has advanced our knowledge into structural areas that have been nearly impossible to measure by other spectroscopic techniques. Innovative applications have led to determinations of polymer configurational distributions, comonomer sequence distributions, average sequence lengths, structure and distribution of short chain branches, and analyses of nonreactive end groups. As a result, the importance of 13C NMR to the field of polymer science cannot be overemphasized. The key to the success of 13C-NMR studies in defining polymer molecular structure has been a structural sensitivity which encompasses more than just a few functional groups or carbon atoms. A sensitivity to polymer repeat unit sequences of lengths from two to as many as five, seven, and even nine contiguous repeat units [1,2] has been observed. Of course, any structural technique that senses a unique response from as f...

Laboratory synthesis of polyethylene glycol derivatives

Abstract: In recent years, derivatives of polyethylene glycol (PEG) have proven valuable in a variety of diverse chemical and biological endeavors. Such applications include peptide synthesis, phase transfer catalysis, pharmaceutical modification, protein and cell purifications, polymer-bound reagents, and binding assays. Because of the great deal of interest surrounding this subject, this review will describe generally applicable laboratory methods for preparing PEG derivatives from the parent PEG. We have largely restricted discussion to this starting material because most research laboratories interested in applications are not equipped to handle complex ethylene oxide polymerizations used in large-scale industrial preparations and because PEG and some of its ethers and esters are the only commonly available polymeric starting materials. For the purpose of this review, PEG is defined as those polyoxyethylenes having hydroxyl endgroups and a molecular weight of 20,000 daltons or less.

The lithium chloride/dimethylacetamide solvent for cellulose: a literature review

Abstract: Cellulose or poly(1·4)-β-D-D-glucose is the most abundant, renewable organic raw material [1]. The molocular structure (Fig. 1) consists of cellobiose repeating units which allow chain-packing by intermolecular [2] and intramolecular [3] hydrogen-bonding. Such strong interactions are responsible for excellent inherent mechanical properties, yet at the same time, interfere with efforts to process or modify the material. Only in a few instances have cellulose derivatives been exploited commercially and certainly not to the extent predicted from raw material availability and cost. Controllable, uniform derivatization has been hampered by the lack of suitable, nondegrading solvents or by a limited range of synthetic reactions within these solvents.

Totally and Partially Biodegradable Polymer Blends Based on Natural and Synthetic Macromolecules: Preparation, Physical Properties, and Potential as Food Packaging Materials

Abstract: The food packaging material is expected to provide optimum protective properties so that the product it encloses remains in satisfactory condition for its anticipated shelf life. The packaging tech...