Bakelite Preparation Properties And Uses Pdf

bakelite preparation properties and uses pdf

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preparation of Bakelite

When phenol C6H6O , which is an organic compound and a common disinfectant, is mixed with … It must be mounted onto bakelite puck, polished using finer and finer grits as well as polishing slurry, and finally it … Water molecule is removed in the process. Making Bakelite is a multi-stage process. Water molecule is removed in the process. Preparation of bakelite: Bakelite is the commercial name for the polymer obtained by the polymerization of phenol and formaldehyde. Chemistry investigatory project - Free download as Powerpoint Presentation.

The Preparation of Bakelite

Harmful: Dilute acetic acid, in the form of vinegar, is harmless. However, ingestion of stronger solutions is dangerous to human and animal life. It can cause severe damage to the digestive system, and a potentially lethal change in the acidity of the blood. Flammable: Concentrated acetic acid can be ignited with difficulty in the laboratory. Corrosive: Concentrated acetic acid is corrosive and must be handled with appropriate care, since it can cause skin burns, permanent eye damage, and irritation to the mucous membranes.

preparation of Bakelite

These solutions for Synthetic Fibres And Plastics are extremely popular among Class 8 students for Science Synthetic Fibres And Plastics Solutions come handy for quickly completing your homework and preparing for exams. Which of these is a natural fibre? They can be spun into filaments, threads or ropes. Cotton fibre is almost pure cellulose that grows in a protective capsule around the seeds of cotton plants. Which of these is a fibre derived from chemicals?

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This reaction is highly exothermic, but that is not why the plastic produced is referred to as "thermoset". Bakelite is a space-network polymer. Unlike linear and branched polymers, which are composed of long molecules that make them more or less crystalline, space-network polymers are highly and irregularly cross-linked throughout the structure. The sheer extent of the cross-linking means that a sample of the material is essentially one gigantic molecule. Although heat softens and melts linear and branched polymers, heating does not soften space-network polymers because such a softening would require the breaking of covalent bonds. In fact, heating usually produces additional cross-linking in these polymers, making them harder.

It is a thermosetting phenol formaldehyde resin , formed from a condensation reaction of phenol with formaldehyde. Bakelite was patented on December 7, The creation of a synthetic plastic was revolutionary for its electrical nonconductivity and heat-resistant properties in electrical insulators, radio and telephone casings and such diverse products as kitchenware, jewelry, pipe stems, children's toys, and firearms. In recent years the " retro " appeal of old Bakelite products has made them collectible. Bakelite was designated a National Historic Chemical Landmark on November 9, , by the American Chemical Society in recognition of its significance as the world's first synthetic plastic.

ACC is investing in research to improve understanding of how chemicals impact health and the environment. View activities underway by the chemical industry and to help provide resources to address and fight the impacts of COVID Studies continue to confirm no association between high molecular weight phthalates and human adverse health effects. A blog of the American Chemistry Council: driving innovation, creating jobs, and enhancing safety. The simplest definition of a polymer is a useful chemical made of many repeating units.


Uses. It is the most widely used plastic. It has high rigidity and chemical bakelite. CH2. CH2. OH. OH. Properties. These phenolic resins are rigid, hard, water.


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Bakelite , trademark of phenol-formaldehyde resin , trademarked synthetic resin invented in by Belgian-born American chemist Leo Hendrik Baekeland. A hard, infusible, and chemically resistant plastic , Bakelite was based on a chemical combination of phenol and formaldehyde phenol-formaldehyde resin , two compounds that were derived from coal tar and wood alcohol methanol , respectively, at that time. This made it the first truly synthetic resin, representing a significant advance over earlier plastics that were based on modified natural materials. Because of its excellent insulating properties, Bakelite was also the first commercially produced synthetic resin, replacing shellac and hard rubber in parts for the electric power industry as well as in home appliances. In the s it was widely used in knobs, dials, circuitry panels, and even cabinets for radios, and it was also employed in the electrical systems of automobiles. In the s cast Bakelite, along with many other competing phenolic resins, enjoyed a vogue in colourful costume jewelry and novelties. It was Baekeland who succeeded in controlling the phenol-formaldehyde condensation reaction to produce the first synthetic resin.

View Datasheet in another language. All information, recommendations and suggestions provided by Bakelite AG in the form of verbal or written communication, or in pertinent data bases, represent our best knowledge and experience. Such data are non-binding in character, and do not represent, either explicitly or implicitly, assurances or a guarantee of specific properties. The specified parameters merely represent typical data; they do not form a basis for either a guarantee or a specification. The information, recommendations and suggestions we provide describe our products and possible applications in general or exemplary terms; they do not relate to specific cases. The process of constant continued development and improvement of our products can lead to changes in pertinent parameters, texts and illustrations; no special mention is made of possible alterations.

Волосатая грудь начиналась сразу под тройным подбородком и выпячивалась ничуть не меньше, чем живот необъятного размера, на котором едва сходился пояс купального халата с фирменным знаком отеля. Беккер старался придать своему лицу как можно более угрожающее выражение. - Ваше имя. Красное лицо немца исказилось от страха. - Was willst du. Чего вы хотите. - Я из отдела испанской полиции по надзору за иностранными туристами.

CAMPUSplastics | datasheet Bakelite® X 22

Хотя и ненамеренно, именно Стратмор привел Дэвида Беккера в АНБ в тот памятный день, позвонив ему по телефону. Мысли Сьюзан перенеслись в прошлое, и глаза ее непроизвольно упали на листок бумаги возле клавиатуры с напечатанным на нем шутливым стишком, полученным по факсу: МНЕ ЯВНО НЕ ХВАТАЕТ ЛОСКА, ЗАТО МОЯ ЛЮБОВЬ БЕЗ ВОСКА. Дэвид прислал его после какой-то мелкой размолвки.

Б нем не чувствовалось грубой силы Грега Хейла, скорее - жестокость отчаяния, внутренняя бездушная решительность. Сьюзан повернулась. Человек, попытавшийся ее удержать, выглядел растерянным и напуганным, такого лица у него она не видела. - Сьюзан, - умоляюще произнес Стратмор, не выпуская ее из рук.  - Я все объясню.

А вдруг это клиент. Новый клиент с севера. Он не допустит, чтобы какие-то страхи лишили его потенциального клиента. - Друг мой, - промурлыкал он в трубку.  - Мне показалось, что я уловил в вашей речи бургосский акцент.

 Я подумала, что АНБ его ликвидировало. - Вот. Если АНБ в состоянии вывести пять риолитовых спутников на геостационарную орбиту над Ближним Востоком, то, мне кажется, легко предположить, что у нас достаточно средств, чтобы подкупить несколько испанских полицейских.  - Его доводы звучали волне убедительно.

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Very smooth molding can be obtained from this polymer. Bakelite moldings are heat-resistant and scratch-resistant. They are also resistant to several destructive solvents. Owing to its low electrical conductivity, bakelite is resistant to electric current.

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