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Leonard Mullins
Leonard Mullins (1918 – 19 September 1997) was a scientist and long-time Research Director at the former Malaysian Rubber Producers' Research Association. He is known for his work on the stress-softening behavior of rubber, a phenomenon now known widely as the Mullins effect. Personal Mullins was born on 21 May 1918 and died on 19 September 1997 at the age of 79. Leonard was the eldest of 7 children, with his brothers Eric, Kenneth, John, known as Alan, and sisters Sylvia, Muriel and Eugenie. He married Freda Churchouse on 6 March 1943 and had 2 daughters Margaret and Janet. Education Mullins graduated from University College London in 1939 BSC (Hons), PhD, DSc Career He had originally hoped to enter academia, but World War II interrupted his plans and he ended up working in weapons research for the British government. In 1949, he oversaw the dismantling of the Bayer A.G. rubber labs and pilot plant at Leverkusen, Germany. In 1950, he joined the physics group of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymer Science
Polymer science or macromolecular science is a subfield of materials science concerned with polymers, primarily synthetic polymers such as plastics and elastomers. The field of polymer science includes researchers in multiple disciplines including chemistry, physics, and engineering. Subdisciplines This science comprises three main sub-disciplines: * Polymer chemistry or macromolecular chemistry is concerned with the chemical synthesis and chemical properties of polymers. * Polymer physics is concerned with the physical properties of polymer materials and engineering applications. Specifically, it seeks to present the mechanical, thermal, electronic and optical properties of polymers with respect to the underlying physics governing a polymer microstructure. Despite originating as an application of statistical physics to chain structures, polymer physics has now evolved into a discipline in its own right. * Polymer characterization is concerned with the analysis of chemical str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BRPRA
The Tun Abdul Razak Research Centre, originally known as the British Rubber Producers' Research Association, carries out research into rubber and is funded by the Malaysian government. Early years: as the British Rubber Producers Research Association: 1938 to 1957 The British Rubber Producers Research Association was formed as a scientific research organization in 1938 'to understand rubber and in pursuit of this aim to mount a programme of fundamental research', since at that time the technology was almost entirely empirical.Biographical Memoirs of Fellows of the Royal Society (1999) vol 45 pp 185-194 It carried out fundamental work on rubber, which included the more general polymer science and the physics and mathematics of rheology and in addition contributed to early work on electronic computers. Prominent in the push for greater rubber research and the establishment of the association was Sir Eric Miller, who became chairman of the BRPRA. In 1939, it obtained its first prem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University College London
, mottoeng = Let all come who by merit deserve the most reward , established = , type = Public research university , endowment = £143 million (2020) , budget = £1.544 billion (2019/20) , chancellor = Anne, Princess Royal(as Chancellor of the University of London) , provost = Michael Spence , head_label = Chair of the council , head = Victor L. L. Chu , free_label = Visitor , free = Sir Geoffrey Vos , academic_staff = 9,100 (2020/21) , administrative_staff = 5,855 (2020/21) , students = () , undergrad = () , postgrad = () , coordinates = , campus = Urban , city = London, England , affiliations = , colours = Purple and blue celeste , nickname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mullins Effect
The Mullins effect is a particular aspect of the mechanical response in filled rubbers, in which the stress–strain curve depends on the maximum loading previously encountered. The phenomenon, named for rubber scientist Leonard Mullins, working at the Tun Abdul Razak Research Centre in Hertford, can be idealized for many purposes as an instantaneous and irreversible softening of the stress–strain curve that occurs whenever the load increases beyond its prior all-time maximum value. At times, when the load is less than a prior maximum, nonlinear elastic behavior prevails. The effect should not be confused with the Payne effect. Although the term "Mullins effect" is commonly applied to stress softening in filled rubbers, the phenomenon is common to all rubbers, including "gums" (rubber lacking filler). As first shown by Mullins and coworkers, the retraction stresses of an elastomer are independent of carbon black when the stress at the maximum strain is constant. Mullins softeni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Goodyear Medal
The Charles Goodyear Medal is the highest honor conferred by the American Chemical Society, Rubber Division. Established in 1941, the award is named after Charles Goodyear, the discoverer of vulcanization, and consists of a gold medal, a framed certificate and prize money. The medal honors individuals for "outstanding invention, innovation, or development which has resulted in a significant change or contribution to the nature of the rubber industry". Awardees give a lecture at an ACS Rubber Division meeting, and publish a review of their work in the society's scientific journal ''Rubber Chemistry and Technology''. Recipients Source: * 1941 David Spence – Diamond Rubber Co. researcher noted for synthesizing isoprene for use in synthetic rubber * 1942 Lorin B. Sebrell – Goodyear Research Director noted for his work on organic accelerators for vulcanization * 1944 Waldo L. Semon – early developer of synthetic rubber, in particular Ameripol for B. F. Goodrich * 1946 I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MRPRA
The Tun Abdul Razak Research Centre, originally known as the British Rubber Producers' Research Association, carries out research into rubber and is funded by the Malaysian government. Early years: as the British Rubber Producers Research Association: 1938 to 1957 The British Rubber Producers Research Association was formed as a scientific research organization in 1938 'to understand rubber and in pursuit of this aim to mount a programme of fundamental research', since at that time the technology was almost entirely empirical.Biographical Memoirs of Fellows of the Royal Society (1999) vol 45 pp 185-194 It carried out fundamental work on rubber, which included the more general polymer science and the physics and mathematics of rheology and in addition contributed to early work on electronic computers. Prominent in the push for greater rubber research and the establishment of the association was Sir Eric Miller, who became chairman of the BRPRA. In 1939, it obtained its first prem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bayer
Bayer AG (, commonly pronounced ; ) is a German multinational corporation, multinational pharmaceutical and biotechnology company and one of the largest pharmaceutical companies in the world. Headquartered in Leverkusen, Bayer's areas of business include pharmaceuticals; consumer healthcare products, agricultural chemicals, seeds and biotechnology products. The company is a component of the Euro Stoxx 50 stock market index. Bayer was founded in 1863 in Barmen as a partnership between dye salesman Friedrich Bayer and dyer Friedrich Weskott. As was common in this era, the company was established as a dyestuffs producer. The versatility of aniline chemistry led Bayer to expand their business into other areas, and in 1899 Bayer launched the compound acetylsalicylic acid under the trademarked name Aspirin. In 1904 Bayer received a trademark for the "Bayer Cross" logo, which was subsequently stamped onto each aspirin tablet, creating an iconic product that is still sold by Bayer. Ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rubber Producers' Research Association
The Tun Abdul Razak Research Centre, originally known as the British Rubber Producers' Research Association, carries out research into rubber and is funded by the Malaysian government. Early years: as the British Rubber Producers Research Association: 1938 to 1957 The British Rubber Producers Research Association was formed as a scientific research organization in 1938 'to understand rubber and in pursuit of this aim to mount a programme of fundamental research', since at that time the technology was almost entirely empirical.Biographical Memoirs of Fellows of the Royal Society (1999) vol 45 pp 185-194 It carried out fundamental work on rubber, which included the more general polymer science and the physics and mathematics of rheology and in addition contributed to early work on electronic computers. Prominent in the push for greater rubber research and the establishment of the association was Sir Eric Miller, who became chairman of the BRPRA. In 1939, it obtained its first pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colwyn Medal
Colwyn was a local government district with borough status from 1974 to 1996, being one of six districts in the county of Clwyd, north-east Wales. History The borough was created on 1 April 1974, under the Local Government Act 1972. It covered parts of four former districts from the administrative county of Denbighshire, which were all abolished at the same time:* *Abergele Urban District *Aled Rural District, except the parish of Llansantffraid Glan Conway, which went to Aberconwy *Colwyn Bay Municipal Borough *Hiraethog Rural District, except the parishes of Eglwysbach, Llanddoget, Llanrwst Rural, and Tir Ifan, which went to Aberconwy The new borough was named Colwyn, taken from the name of the area's largest town, Colwyn Bay. Under the Local Government (Wales) Act 1994, Clwyd County Council and the county's constituent districts were abolished, being replaced by principal areas, whose councils perform the functions which had previously been divided between the county and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order Of The Defender Of The Realm
The Most Esteemed Order of the Defender of the Realm ( ms, Darjah Yang Mulia Pangkuan Negara) is a Malaysian federal award presented for meritorious service to the country. The Order Motto are 'Dipeliharakan Allah-Pangkuan Negara' (By the Grace of God-Defender of the Realm). The order was instituted on 6 August 1958 and initially had the five highest ranks. The medal was added on 19 August 1960. Order ranks The order has six ranks: Grand Commander * Grand Commander of the Order of the Defender of the Realm (S.M.N.) ( ms, Seri Maharaja Mangku Negara).Official Malay monarchy website , Seri Maharaja Mangku Negara (S.M.N.), photo of the decoration This rank is limited to 25 living recipients at any time, except foreign citizens who are conferred honorary awards. The recipient of this award recei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymer Scientists And Engineers
A polymer (; Greek ''wikt:poly-, poly-'', "many" + ''wikt:-mer, -mer'', "part") is a Chemical substance, substance or material consisting of very large molecules called macromolecules, composed of many Repeat unit, repeating subunits. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass, relative to small molecule compound (chemistry), compounds, produces unique physical property, physical properties including toughness, high rubber elasticity, elasticity, viscoelasticity, and a tendency to form glass, amorphous and crystallization of polymers, semicrystalline structures rather ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
