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TIMELINE OF MATERIALS AND TECHNOLOGICAL DISCOVERIES-16

Imran Predhanekar
TIMELINE OF MATERIALS AND TECHNOLOGICAL DISCOVERIES-16

1926 Waldo Semon at B.F. Goodrich invents plasticized PVC known as vinyl
1929 Polysulfide (Thiokol) rubber is synthesized
1929 Carothers (du Pont) synthesizes the first aliphatic polyesters, establishes the principles of step-growth polymerization, and develops nylon 6,6
1931 Julius Nieuwland develops the synthetic rubber called neoprene
1931 Poly(methylmethacrylate) (PMMA) is synthesized
1932 Hans von Ohain and Sir Frank Whittle file patents for the jet engine
1932 Cathode ray tubes (CRTs) are invented by Allen B. Du Mont
1933 Ernest Ruska discovers the electronmicroscope; magnification of 12,000 _
1933 Fawcett and Gibson develop polyethylene (LDPE)
1936 The first programmable computer, the Z1, is developed by Konrad Zuse
· · · January 25 at 10:31pm
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  1. larry dinaJuly 18, 2019 at 11:17 PM

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  2. larry dinaAugust 6, 2019 at 7:30 AM

    Dr OBUDU have been a great doctor even know in the world, am here today to tell the world my testimony about how i was cured from herpes.i was having this deadly disease called herpes in my body for the past 6 years but now i know longer have it again. i never know that this disease have cure not until i meet someone know to the world called Dr OBUDU he cured me from herpes he have been great to me and will also be great to you too. i have work with other doctor but nothing come out. one day i did a research and came across the testimony of a lady that also have same disease and got cured by Dr OBUDU. then i contacted his email and told him my problem.he told me not to worry that he have the cure i didn't believe him when he said so because my doctor told me there is no cure.he told me i need to get a herbal medicine for the cure which i did and now am totally cured you can also be cured of any other diseases too if only you believe in him. contact him via email OBUDU.MIRACLEHERBALHOME@GMAIL.COM you can also call or whatsapp him true his mobile number +2347035974895

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  3. summer jessicAugust 8, 2019 at 8:05 AM

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  4. Giphy OliviaAugust 9, 2019 at 11:16 PM

    I was diagnose with human papilloma virus (HPV) 4 years ago and i met a doctor he told me there is no cure and i have be taking some medication the warts multiplied when trying to removed them and it got me embarrass and pains, luckily few weeks ago i was recommend to Dr Onokun for natural treatment after one week i got 100% cure and all the wart and pains got disappeared, i sheared this post because its part of my life experience, encase anyone need speedy help about this cure email Dr Onokun via, dronokunherbalcure@gmail.com

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