an antioxidant for polymers in nigeria

polymer additives - antioxidants

Polymer Additives - Antioxidants

Antioxidants are highly effective in preventing this degradation to the extent that color development, physical and mechanical property loss is kept within acceptable limits. The diagram below represents a complex series of chemical reactions that take place when the polymer degrades in the presence of oxygen and how antioxidants can intervene ...

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antioxidant polymers | wiley online books

Antioxidant Polymers | Wiley Online Books

Antioxidant Polymers is an exhaustive overview of the recent developments in the field of polymeric materials showing antioxidant properties. This research area has grown rapidly in the last decade because antioxidant polymers have wide industry applications ranging from materials science to biomedical, pharmaceuticals and cosmetics.

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extraction, synthesis, characterization and antioxidant

Extraction, synthesis, characterization and antioxidant

Extraction, synthesis, characterization and antioxidant properties of oxidized starch from an abundant source in Nigeria Christianah Isimi, Asha Rodrigues, Olubunmi Olayemi, Marlene Ekpo, Martins Emeje

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secondary antioxidant - an overview | sciencedirect topics

Secondary Antioxidant - an overview | ScienceDirect Topics

Phosphites, and in particular organophosphorus compounds, are secondary antioxidants that decompose peroxides and hydroperoxides into stable, nonradical products, according to Scheme 4.4.They are extremely effective stabilizers during processing and are normally used in combination with a primary antioxidant. Trivalent phosphorus compounds are excellent hydroperoxide decomposers.

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antioxidants & antidegradants

Antioxidants & Antidegradants

Antioxidants & Antidegradants . All polymers & products baded on them are subject to degradation on exposure to the degradative environments such as: - Storage aging - Oxygen - Heat - UV Light & Weathering - Catalytic degradation due to the presence of heavy metal Ions (Cu, Mn, Fe etc.) - Dynamic Flex - Fatigue

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antioxidants - crow

Antioxidants - CROW

Antioxidants. Polymers will change over time when exposed to radiation, excessive heat and/or corrosive enviroments. These changes are the result of oxidative degradation caused by free radicals which form through hydrogen abstration or homolytic scission of carbon-carbon bonds when polymers are exposed to heat, oxygen, ozone, or light.

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an introduction to polymers and some profiles of polymer

An Introduction to Polymers and Some Profiles of Polymer

Polymers have existed in natural form since life began and those such as DNA, RNA, proteins and polysaccharides play crucial roles in plant and animal life . From the earliest times, man has exploited naturally occurring polymers as materials for providing clothing, decoration, shelter, tools, weapons, writing materials and other requirements.

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the use of natural antioxidant active polymer packaging

The Use of Natural Antioxidant Active Polymer Packaging

Natural antioxidants that can be incorporated into polymer systems to produce active polymer packaging films include oxygen scavengers, ethylene scavengers, flavour and odor absorbers/releasers.

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12 healthy foods high in antioxidants

12 Healthy Foods High in Antioxidants

Antioxidants are compounds produced in your body and found in foods. They help defend your cells from damage caused by potentially harmful molecules known as free radicals. When free radicals ...

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list of antioxidants in food

List of antioxidants in food

Most food compounds listed as antioxidants – such as polyphenols common in colorful, edible plants – have antioxidant activity only in vitro, as their fate in vivo is to be rapidly metabolized and excreted, and the in vivo properties of their metabolites remain poorly understood.

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polymers, antioxidants & specialty additives

Polymers, Antioxidants & Specialty Additives

The behaviour and properties of polymers including polymer blends, polymer micro- and nano-composites and automotive coatings, are investigated duringThe group has extensive experience in antioxidant chemistry relating to synthetic, non-migratory (graftable) and natural antioxidants and

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some mechanistic insights in the behaviour of thiol

Some mechanistic insights in the behaviour of thiol

Modified polyethylene glycol polymers are described in which thiol containing groups have been added via a simple esterification step. The resultant thiol end-capped polyethers retain the antioxidant behaviours of the monomeric thiols, but mitigate essentially completely the undesirable properties of

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plants : a new source of additives for polymers

Plants : a new source of additives for polymers

antioxidant activity within a polymer. matrix, owing to ageing due from. conditions of use (heat and light).The potential use of natural antioxidants for polyolefin stabilisation came into the centre of attention because of some doubts about the effects of the reaction products of synthetic phenolic

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phenolic antioxidant - an overview | sciencedirect topics

Phenolic Antioxidant - an overview | ScienceDirect Topics

A halogen containing polymer in the form of an aqueous suspension or emulsion contains a partially hindered phenolic antioxidant and selected sulfur containing antioxidants, which are both solid at 20°C.313The formation of stilbenequinone in polymers stabilized with BHT is most investigated.

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smart antioxidant-containing polymer responds to body chemistry

Smart antioxidant-containing polymer responds to body chemistry

Oxidants found within living organisms are byproducts of metabolism and are essential to wound-healing and immunity.A new drug-delivery system that contains crystalized catechin -- an antioxidant found in green tea and fruit -- can sense trouble and respond by releasing antioxidant to

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tea catechins and polyphenols: health effects, metabolism, and

Tea catechins and polyphenols: health effects, metabolism, and

In humans, modest transient increases in plasma antioxidant capacity have been demonstrated following the consumption of tea and green tea catechins. The effects of tea and green tea catechins on biomarkers of oxidative stress, especially oxidative DNA damage, appear very promising in animal

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polymer additives - antioxidants

Polymer Additives - Antioxidants

Polymer Additives - Primary and Secondary Antioxidants. Practically all polymer materials undergo oxidative degradation reactions occurring at one orPrimary antioxidants (phenolics) and secondary antioxidants (phosphites, also known as processing stabilizers) thus play an important role in

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edible polymers: challenges and opportunities

Edible Polymers: Challenges and Opportunities

Edible polymers offer many advantages for delivering drugs and tissue engineering. Edible polymer technology helps food industries to make their products more attractive and safe to use.Additionally, polypeptide-based edible polymer can function as carriers for antimicrobial and antioxidant agents.

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methods for testing antioxidant activity - analyst (rsc publishing) doi

Methods for testing antioxidant activity - Analyst (RSC Publishing) DOI

Methods of assessing antioxidant behaviour fall into two broad categories reflecting the focus on activity in foods or bioactivity in humans. In the case of food systems, the need is to assess the efficacy of an antioxidant(s) in providing protection for the food7 against oxidative spoilage.

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antioxidants: health benefits and nutritional information

Antioxidants: Health benefits and nutritional information

Antioxidants are mostly found in plant foods. They are natural molecules that help neutralize harmful free radicals in our bodies. Free radicals are potentially harmful substances that result from metabolism and the environment. They may lead to oxidative stress, which contributes to heart disease and other

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