α-Methylenic reactivity in olefinic and polyolefinic systems

Farmer, Ernest Harold

doi:10.1039/tf9423800340

Cited by 91 publications

(31 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A variety of lipid byproducts are produced as a consequence of lipid peroxidation, some of which can exert adverse and/or beneficial biological effects [29,30].…”

Section: Methodsmentioning

confidence: 99%

Progression of Coronary Artery Disease (CAD) from Stable Angina (SA) Towards Myocardial Infarction (MI): Role of Oxidative Stress

Uppal

2014

JCDR

View full text Add to dashboard Cite

Introduction: There is now a consensus that atherosclerosis represents a state of heightened oxidative stress which is characterized by lipid and protein oxidation in the vascular wall. Inspite of many efforts which were made to explain the role of oxidative stress in progression of CAD (Coronary Artery Disease), its predictive role is still not clear. In order to fill these lacunae and to establish the utility of antioxidant vitamins in delaying the progression of CAD from stable angina (SA) towards myocardial Infarction (MI), the present study was conducted.

show abstract

“…A variety of lipid byproducts are produced as a consequence of lipid peroxidation, some of which can exert adverse and/or beneficial biological effects [29,30].…”

Section: Methodsmentioning

confidence: 99%

Progression of Coronary Artery Disease (CAD) from Stable Angina (SA) Towards Myocardial Infarction (MI): Role of Oxidative Stress

Uppal

2014

JCDR

View full text Add to dashboard Cite

show abstract

“…Es wurde ein allgemeines Schema der Autoxydation organischer Verbindungen aufgestellt, bei dem sich der Sauerstoff zwischen eine "durch benachbarte Substituenten aktivierte CH-Bindung einschiebt" 66 67 ) als "a-Methylen-Mechanismus" bezeichnet, was bedeutet, daß eine durch irgendeine benachbarte Gruppe aktivierte Methylen-Gruppe in einer Radikalkettenreaktion O 2 addiert:…”

Section: Bildung Von Peroxyden Der Carbonyl-verbindungen Durch Autoxyunclassified

Über Peroxyde der Äther, der Carbonyl‐Verbindungen und die Ozonide

Rieche

1958

Angewandte Chemie

View full text Add to dashboard Cite

show abstract

“…Though the maleic anhydride is purported and mechanistically favoured an Diels-Alder reaction (Alder et al 1943) in the methylene/allylic double carbon bonds (> C = C <) as reported in the classical chemical reactions (Baraboim & Popov 1963), and also by Pinazzi (Pinazzi et al 1963), andFarmer (1942)in natural rubber, while Loo (1985) reported that it is possible that the dibasic acids could be used to open the epoxide ring and also used as crosslink sites, or the dibasic acids used to crosslink in the non-sulphur accelerated curing system.…”

Section: Chemical Reaction Mechanism That Possibly Enhances the Propementioning

confidence: 99%

Potential Application of ENR/EPDM Blends

Chan

2017

AJSTD

View full text Add to dashboard Cite

Since the process and conversion of natural rubber into epoxidized natural rubber (ENR) was discovered and patented by I. R. Gelling of the Malaysian Rubber Product Research Association (or now known as the Tun Razak laboratory), Brickendonbury, Hertford, in the United Kingdom, there are more than 10 000 technical and technological papers cited in the internet. Information on ENR is available, not only in the the English language but also other languages like Chinese, Malay, French, Thai and even German languages are used.NR is the most versatile and reactive rubber/elastomer. It is an advanced natural rubber which could be potentially used as a starting material for the development of other rubbers, modifie elastomers, for grafting, plastic-based materials and also thermoplastic rubbers. Its reactivity is dependent on its epoxy groups, the opening of its ring structure, and also the subsequent structures of carboxylic groups and the in-situ side-chains “carbon – carbon” double bonds (> C = C <). In some instances, up to 65% epoxidation of NR is possible and achieved for more oil resistance. For these reasons, there are many new and advanced materials which have been formed and developed in the last two decades.Among them, some of the recent research work is listed here. Apart from studies of compounding the ENR itself and its potential uses, there are many rubber-rubber blends and ENR rubber-plastics blends, some of the studies cited are “uses of new and advanced chemicals” and synthetic rubbers: ENR/NBR, ENR/PVC, ENR/polylactic acid blends, ENR/copolyester blends, ENR/Copolyamide Blends, ENR/poly (vinylidene fluoride)blends, ENR/Carbon Nanotubes with co-agent Trimethylol Propane Triacrylate, ENR /recycled silicon materials, and ENR/copolymer of n-butyl acrylate/butyl methacrylate “grafted”. Each of these blends has its own characteristics in terms of processing, enhancement of processing like safety, scorch, oil and water resistance properties, or some in the development of potential thermoplastic rubber and its thermoplastic vulcanizates.In this paper, the author would like to share some findingsof the ENR/EPDM blends that have good flexand dynamic properties, relatively low compression set, and tolerant tensile properties that satisfy most rubber products that are required for and used in the industrial, mechanical, and even automotive parts. More importantly, the sliding skid resistance/frictional property and wear resistance of the blends are also examined. In some blends, the thermal dynamic behaviour is also measured over a temperature range depicting the low-temperature stability, its temperature of transition and the dynamic factor like tangent delta (σ). These are the potential factors that could enhance the blend properties that give possible, good high speed and traction, applicable in tyres.

show abstract

α-Methylenic reactivity in olefinic and polyolefinic systems

Cited by 91 publications

References 0 publications

Progression of Coronary Artery Disease (CAD) from Stable Angina (SA) Towards Myocardial Infarction (MI): Role of Oxidative Stress

Progression of Coronary Artery Disease (CAD) from Stable Angina (SA) Towards Myocardial Infarction (MI): Role of Oxidative Stress

Über Peroxyde der Äther, der Carbonyl‐Verbindungen und die Ozonide

Potential Application of ENR/EPDM Blends

Contact Info

Product

Resources

About