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Human health and environmental facts of aluminium diethyl phosphinate are summarized in a fact sheet. [13] Further data are given in the Arcadis Study carried out on behalf of the European Commission Health & Consumers DG, Contract number 17.020200/09/549040: “Identification and evaluation of data on flame retardants in consumer products.
Polymer degradation is the reduction in the physical properties of a polymer, such as strength, caused by changes in its chemical composition.Polymers and particularly plastics are subject to degradation at all stages of their product life cycle, including during their initial processing, use, disposal into the environment and recycling. [1]
Sodium triacetoxyborohydride, also known as sodium triacetoxyhydroborate, commonly abbreviated STAB, is a chemical compound with the formula Na[(CH 3 COO) 3 BH]. Like other borohydrides, it is used as a reducing agent in organic synthesis. This colourless salt is prepared by protonolysis of sodium borohydride with acetic acid: [1]
In polymers, such as plastics, thermal degradation refers to a type of polymer degradation where damaging chemical changes take place at elevated temperatures, without the simultaneous involvement of other compounds such as oxygen.
The process of biodegradation can be divided into three stages: biodeterioration, biofragmentation, and assimilation. [3] Biodeterioration is sometimes described as a surface-level degradation that modifies the mechanical, physical and chemical properties of the material.
When a monomer adds to a radical chain end, there are two factors to consider regarding its stereochemistry: 1) the interaction between the terminal chain carbon and the approaching monomer molecule and 2) the configuration of the penultimate repeating unit in the polymer chain. [4] The terminal carbon atom has sp 2 hybridization and is planar.
2,4-Dichlorophenoxyacetic acid is an organic compound with the chemical formula Cl 2 C 6 H 3 OCH 2 CO 2 H.It is usually referred to by its ISO common name 2,4-D. [4] It is a systemic herbicide that kills most broadleaf weeds by causing uncontrolled growth, but most grasses such as cereals, lawn turf, and grassland are relatively unaffected.
On the other hand, cis-4-tert-butylcyclohexyl chloride undergoes elimination because antiperiplanarity of Cl and H can be achieved when the t-Bu group is in the favorable equatorial position. Thermodynamically unfavored conformation of trans -4- tert -butylcyclohexyl chloride where the t -Bu group is in the axial position exerting 7-atom ...