An example of ROP of a cyclic monomer. The polycondensation synthesis of polyesters requires two steps and depending on the use of the diacid or the dimethyl ester of the diacid, two different industrial processes are developed.64 For the first step of the diacid process, the diacid is pre...
An example of specific interactions between ions and adsorbed polymers: Polyethylene oxide and selenite - ScienceDirectMolecular dynamicsLangevin dynamicsatomic trajectoriestime-dependent propertiessoft-spheresIt is shown that the adsorption of selenite on a mercury electrode is doubled when polyethylene oxide...
For example, our customers use it for the following products: chemicals, petrochemicals, minerals, agricultural products, seeds and food products. Because the polypropylene fabric is attached to the inside of the container, the product does not touch the container itself. It creates an ...
ketones such as acetone and methyl ethyl ketone; and alcohols such as methanol and isopropanol. There is an upper temperature limit of solubility in water for the high molecular weight poly(ethylene oxide)s; this varies with concentration and molecular weight but is usually between 90 and 100??
Therefore, an external H2 source or hydrogen enriched co-reactants is required to promote the conversion. For example, with high-pressure H2, liquid fuels can be generated from polyolefins through hydrogenolysis or hydrocracking on noble metal catalysts15,16,17,18,19,20,21 (Fig. 1a and ...
For example, low density polyethylene (LDPE) has a highly branched structure resulting in a density of ~ 0.92 g/cm3 and degrees of crystallinity ranging from 40 to 55% while high density polyethylene (HDPE) is primarily composed of linear C2H4 chains and possesses a higher density (~ ...
The use of inert particles to make the film surface appropriately rough improves the abrasion resistance and the running features of the polyester film. An example of this approach is provided in US Patent 5580652, assigned to SKC Limited.10 In that patent, work is described which involves the...
One shall realize from this drawing that there is also an air gap before the solution enters the quenching water. This configuration of gap may be inspired from the air gap developed in the PPTA fiber spinning. The products developed by DSM were commercialized under the brand name of Dyneema,...
a Cradle-to-factory gate system boundary of closed-loop upcycling PET via an acetolysis process based on the cut-off approach (illustrated by taking waste PET bottles as an example). b Schematic diagram of closed-loop upcycling PET via the acetolysis (decolorization not shown). Full size imag...
Preferably, the primary antioxidant is a phenolic antioxidant. An example of suitable phenolic antioxidants is pentaerythrityl tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenol)propionate), which is commercially available from Ciba Inc. under the name of IRGANOX®1010. Suitable phenolic antioxidants ...