হেরমান স্টাউডিঞ্জার: সংশোধিত সংস্করণের মধ্যে পার্থক্য
বিষয়বস্তু বিয়োগ হয়েছে বিষয়বস্তু যোগ হয়েছে
Jdebabrata (আলোচনা | অবদান) |
Jdebabrata (আলোচনা | অবদান) |
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৫৪ নং লাইন:
[[Image:clipspla.jpg|thumb|'''চিত্র ৩.''' কাগজের টুকরো দিয়ে তৈরী একটি শৃঙ্খলা ''(উপরে)'' পলিমারের জন্য যেমন [[polylactic acid|পলিল্যাকটিক অ্যাসিড]] ''(নীচে)'' এর জন্য একটি ভাল মডেল। পলিমার শৃঙ্খল ছোট ছোট টুকরো টুকরো একসাথে মাথা থেকে লেজ বিন্যাসে যুক্ত থাকে।]]
In 1926 he was appointed lecturer of chemistry at the [[University of Freiburg]] at Freiburg im Breisgau (Germany), where he spent the rest of his career.<ref>[https://www.nobelprize.org/nobel_prizes/chemistry/laureates/1953/staudinger-bio.html Biography on Nobel prize website]</ref> In 1927, he married the Latvian botanist, [[Magda Staudinger|Magda Voita]] (also shown as ({{lang-de|Magda Woit}}), who was a collaborator with him until his death and whose contributions he acknowledged in his Nobel Prize acceptance.{{sfn|Ogilvie|Harvey|2000|p=1223}} Further evidence to support his polymer hypothesis emerged in the 1930s. High molecular weights of polymers were confirmed by [[osmotic pressure|membrane osmometry]], and also by Staudinger’s measurements of [[viscosity]] in solution. The [[X-ray diffraction]] studies of polymers by [[Herman Mark]] provided direct evidence for long chains of repeating molecular units. And the synthetic work led by [[Wallace Carothers|Carothers]] demonstrated that polymers such as [[nylon]] and [[polyester]] could be prepared by well-understood organic reactions. His theory opened up the subject to further development, and helped place polymer science on a sound basis.
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