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(2010-11-18 11:09:28)







分类: 名人传记


    Chemist Leo Baekeland
    [1] In the opening scene of The Graduate, Benjamin Braddock (played by a young Dustin Hoffman) is awkwardly working an affluent Southern California crowd at a graduation party arranged for him by his parents when a family friend offers one of the century's most famous pieces of cine-matic advice: "I just want to say one word to you. Just one word: plastics."
    [2] Millions of moviegoers winced and smiled. The scene neatly captured their own late '60s ambivalence toward the ever more synthetic landscape of their times. They loved their cheap, easy- to-clean Formica countertops, but envied-and longed for-the authentic touch and time-lessness of marble and wood. The chord struck by that line in The Graduate under-scored how much had happened in the six decades since the summer of 1907, when Leo Baekeland made the laboratory break-through that would change the stuff our world is made of.
    [3] A Belgian-horn chemist-entrepreneur, Baekeland had a knack for spotting profitable opportunities. He scored his first success in the 1890s with his invention of Velox, an improved photographic paper that freed photographers from having to use sunlight for developing images. With Velox, they could rely on artificial light, which at the time usually meant gaslight but soon came to mean electric. It was a far more dependable and convenient way to work. In 1899 George Eastman, whose cameras and developing services would make photogra-phy a household activity, bought full rights to Velox for the then astonishing sum of $ 1 million.
    [4] With that windfall, Baekeland, his wife Celina(known as "Bonbon") and two children moved to Snug Rock, a pala-tial estate north of Yonkers, N.Y., over-looking the Hudson River. There, in a barn be converted into a lab, he began foraging for his next big hit. It wasn't long before the burgeoning electrical industry seemed to say just one word to him: insulators.
    [5] The initial tease for Baekeland----"Doc Baekeland" to many-was the rising cost of shellac. For centuries, the resinous secretions that Laccifer lacca beetles de-posited on trees had provided a cottage in-dustry in southern Asia, where peasants heated and filtered it to produce a varnish for coating and preserving wood products. Shellac also happened to be an effective electrical insulator. Early electrical workers used it as a coating to insulate coils, and molded it into stand-alone insulators by pressing together layers of shellac-impreg-nated paper.
    [6] When electrification began in earnest in the first years of the century, de-mand for shellac soon outstripped supply. Baekeland recognized a killer ap when he saw one. If only he could come up with a synthetic substitute for shellac.
    [7] Others nearly beat him to it. As early as 1872, German chemist Adolf Von Baeyer was investigating the recalcitrant residue that gathered in the bottom of glass-ware that had been host to reactions be-tween phenol (a turpentine-like solvent dis-tilled from coal tar, which the gas-lighting industry produced in bulk) and formalde-hyde (an embalming fluid distilled from wood alcohol). Von Baeyer set his sights on new synthetic dyes, however, not insulators. To him, the ugly, insoluble gunk in his glassware was a sign of a dead end.
    [8] To Baekeland and others aiming to find commercial opportunities in the nascent electrical industry, that gunk was a signpost pointing toward something great. The chal-lenge for Baekeland and his rivals was to find some set of conditions----some slippery ratio of ingredients and heat and pressure that would yield a more workable, shellac-like substance. Ideally it would be some-thing that would dissolve in solvents to make insulating varnishes and yet be as moldable as rubber.
    [4]有了这笔意外之财,贝克兰及其妻子塞丽娜(也称“夹心软糖”)和他们的两个孩子移居到了Snug Rock,那是位于纽约州扬克斯北部的一处可以俯瞰哈得孙河的豪华别墅。在那儿,在一间谷仓改建的实验室里,他开始为他下一个惊世之作搜寻资料。不久,发展中的电力工业似乎在向他展示一个词:绝缘物。

庭小工业提供了原料,该地区农民把树脂分泌物加热过滤,生产一 种用作涂料和保护木制品的清漆。紫胶恰巧还是一种有效的绝缘物。早期的电力工人将它用作涂料,隔离缠绕在一起的线圈,还将注满了紫胶的纸一层层地压紧制成单独的绝缘物。
    [9] Starting around 190)4, Baekeland and an assistant began their search. Three years later, after filling laboratory books with page after page of failed experiments, Baekeland finally developed a material that he dubbed in his notebooks "Bakelite". The key turned out to be his "bakelizer", a heavy iron vessel that was part pressure cooker and part basement boiler. With it, be was able to control the formaldehydephenol phenol reaction with more finesse than had anyone before him.
    [10] initial heating of the phenol and formaldehyde (in the presence of an acid or base to get the reaction going) produced a shellac-like liquid good for coating surfaces like a varnish. Further heating turned the liquid into a pasty, gummier good. And when Baekeland put this stuff into the bakelizer, he was rewarded with a hard, translucent, infinitely moldable substance. In a word: plastic.
    [11] He filed patent applications and soon began leaking word of his invention to other chemists. In 1909 Baekeland un-veiled the world's first fully synthetic plas-tic at a meeting of the New York chapter of the American Chemical Society. Would-be customers discovered it could be fashioned into molded insulation, valve parts, pipe stems, billiard balls, knobs, buttons, knife handles and all manners of items.
    [12] It was 20th century alchemy. From something as vile as coal tar came a remarkably versatile substance. It wasn't the first plastic, however. Celluloid had been commercially available for decades as a substitute for tortoise-shell, horn, bone and other materials. But celluloid, which had developed a reputation as a cheap mim-ic of better traditional materials, was de-rived from chemically treated cotton and other cellulose-containing vegetable matter. Bakelite was lab-made through and through. It was 100% synthetic.
    [13] Baekeland founded the Central Bakelite Corp. to both make and license the manufacture of Bakelite. Competitors soon marketed knockoffs----most notably Redmanol and Condensite, which Thomas Edison used in a failed attempt to dominate the nascent recording industry with "un-breakable" phonograph disks. The presence of inauthentic Bakelite out there led to an early 20th century version of the "Intel In-side" logo. Items made with the real thing carried a "tag of genuineness" bearing the Bakelite name. Following drawn-out patent wars, Baekeland negotiated a merger with his rivals that put him at the helm of a veri-table Bakelite empire.
    [14] Bakelite became so visible in so many places that the company advertised it as "the material of a thousand uses". It be-came the stuff of everything from cigar hold-ers and rosary beads to radio housings, dis-tributor caps and telephone casings. A 1924 Time cover story on Baekeland reported that those familiar with Bakelite's potential "claim that in a few years it will be embod-ied in every mechanical facility of modern civilization".
    [15] In truth, Bakelite-whose more chemically formal name is polyoxybenzylmethylenglycolanliydrid----was just a harbinger of the age of plastics. Since Bakelite's heyday, researchers have churned out a polysyllabic catalog of plastics: polymethylmetliacrylate ( Plexiglas ), polyesters, polyethylene, polyvinyl chloride (PVC, a. k. a. vinyl), polyhexamethylene adipamide (the original nylon polymer), polytetnifluoroethylene(Teflon), polyurethane, poly-this, poly-that.
    [16] In 1945, a year after Baekeland died, annual plastic production in the U.S. reached more than 400,000 tons. In 1979, 12 years after The Graduate, the an-nual volume of plastic manufactured over-took that of steel, the symbol of the Indus-trial Revolution. last year nearly 47 million tons of plastic were produced.
    [17] Today plastic is nearly every-where, from the fillings in our teeth to the chips in our computers (researchers are de-veloping flexible transistors made of plastic instead of silicon so they can make marvels such as a flat-panel television screen that will roll like a scroll up your living-room wall). Plastic may not be as vilified now as it was in 1967, but it's still a stuff that peo-ple love and hate. Every time a grocery clerk asks, "Paper or plastic?",


the great debate between old and new, natural and synthetic, biodegradable and not, silently unfolds in a shopper's breast in the instant it takes to decide on the answer.
    [13]贝克兰建立了通用酚醛塑料公司,不仅制造酚醛塑料,而且颁发它的生产许可证。竞争者不久就开始销售假冒产品——最有名的是Redmanol和Condensite,托马斯·爱迪生曾使用过这些产品,企图以“不碎的”唱机盘片独占刚起步的唱片工业,但宣告失败。从那儿开始的假冒酚醛塑料的出现引出了20世纪早期的“Intel Inside”商标形式。用真材实料制成的物品都带有一个标有酚醛名字的“真货商标”。经过持久的专利战,贝克兰和他的对手签约合作,使他获得了一个真正的酚醛塑料大企业的领导权。
    [15]事实上,酚醛----其正式的化学名称是聚甲苯甲醛甘醇酐----只是预示了塑料时代的到来。自酚醛的发展高峰期以来,研究者们已研制出了多种多样的塑料:聚甲基丙烯酸甲酯(有机玻璃)、聚酯、聚乙烯、聚氯乙 烯(PVC,也称乙烯基)、聚亚乙基乙二酸胺(原先的尼龙聚合物)。聚四氯乙烯(特氟隆)、聚氨酯、聚这个、聚那个。




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