- published: 23 Jan 2020
- views: 15498265
Poly, from the Greek πολύς meaning "many" or "much", may refer to:
Poly(methyl methacrylate) (PMMA), also known as acrylic or acrylic glass as well as by the trade names Plexiglas, Acrylite, Lucite, and Perspex among several others (see below), is a transparent thermoplastic often used in sheet form as a lightweight or shatter-resistant alternative to glass. The same material can be utilised as a casting resin, in inks and coatings, and has many other uses.
Although not a type of familiar silica-based glass, the substance, like many thermoplastics, is often technically classified as a type of glass (in that it is a non-crystalline vitreous substance) hence its occasional historic designation as acrylic "glass". Chemically, it is the synthetic polymer of methyl methacrylate. The material was developed in 1928 in several different laboratories by many chemists such as William Chalmers, Otto Röhm and Walter Bauer and was first brought to market in 1933 by the Rohm and Haas Company under the trademark Plexiglas.
PMMA is an economical alternative to polycarbonate (PC) when extreme strength is not necessary. Additionally, PMMA does not contain the potentially harmful bisphenol-A subunits found in polycarbonate. It is often preferred because of its moderate properties, easy handling and processing, and low cost. Non-modified PMMA behaves in a brittle manner when under load, especially under an impact force, and is more prone to scratching than conventional inorganic glass, but modified PMMA is sometimes able to achieve high scratch and impact resistance.
Poly(hydridocarbyne) (PHC) is one of a class of carbon-based random network polymers primarily composed of tetrahedrally hybridized carbon atoms, each having one hydride substituent, exhibiting the generic formula [HC]n. PHC is made from bromoform, a liquid halocarbon that is commercially manufactured from methane. At room temperature, poly(hydridocarbyne) is a dark brown powder. It can be easily dissolved in a number of solvents (tetrahydrofuran, ether, toluene etc.), forming a colloidal suspension that is clear and non-viscous, which may then be deposited as a film or coating on various substrates. Upon thermolysis in argon at atmospheric pressure and temperatures of 110 °C to 1000 °C, decomposition of poly(hydridocarbyne) results in hexagonal diamond (Lonsdaleite).
More recently poly(hydridocarbyne) has been synthesized by a much simpler method using electrolysis of chloroform (May 2008) and hexachloroethane (June 2009).
The novelty of PHC (and its related polymer poly(methylsilyne)) is that the polymer may be readily fabricated into various forms (e.g. films, fibers, plates) and then thermolized into a final hexagonal diamond ceramic.
Robocar POLI Season 1 (Full Version) Ep. 01 Rescue Team of Brooms Town Super transforming Robocar rescue team is here to save our neighbors and friends from dangers. There are always accidents and troubles in Broom’s town. But, in the every moment of crisis, there is our super Robocar rescue team to save the cars and people from the dangerous situation. They are Super police car POLI and his team-mate, fire-truck ROY, ambulance AMBER, Helicopter HELLY and operator girl JIN. Through the rescue process of each episode, children get to know the daily safe tips, and the happiness and preciousness when they help others by POLI and his friends of Broom’s town. friendship, safety, accidents, rescue #Baby #Kids #Animation #Education #Preschool #safety #friendship #accidents #rescue Connect w...
We brought together all 5 polytechnics to find out why they chose to go to poly, which poly is the best, how each poly school culture is like and advice for prospective students. The students discuss freshmen orientation and school systems. #Olevels #Polytechnics #Diploma 0:00 Intro 0:30 Why did you choose to go to poly? 2:28 Why did you choose your polytechnic? 6:38 What is your school culture like? 13:22 What is your polytechnic stereotype? 15:52 Are there any stigmas to polytechnics? 19:13 What are the pros and cons of being in a polytechnic? 22:20 Do you have any regrets about being in a polytechnic? 24:29 Why did Patricia dropped out of JC? 27:07 Any advice for prospective students? - Ngee Ann Polytechnic (NP) - Temasek Polytechnic (TP) - Nanyang Polytechnic (NYP) - Republic Polyt...
Bentornati al V-Tournament! Nuovo versus, sempre quarti di finale, tocca a Creepy contro ReMidas. Nel V-Tournament i giocatori dovranno competere per ottenere il punteggio più alto possibile in 25 run o entro un limite di tempo di 2 ore. Buoni Pokémon a tutti! ► Regolamento V-Tournament: https://shorturl.at/bmxDZ ► Tabellone Torneo: https://shorturl.at/pquAT ► Sito per REGISTRARSI e GIOCARE (se siete abbonati) alla Kaizo V: https://www.startab.it ► Il mio canale Twitch: https://www.twitch.tv/poly ► Il canale Twitch di Remidas: https://www.twitch.tv/remidas1 ► Il canale Twitch di Creepy: https://www.twitch.tv/creepy_live ► Il canale Twitch di AlePre: https://www.twitch.tv/alepre98 ► Vai su https://nordvpn.com/polyvpn per acquistare NordVPN con uno sconto esclusivo + 4 mesi extra sui pia...
Ever wondered how life in poly is? In this episode of Singaporeans Try, 3 of us, ex-JC students became polytechnic students! Watch as we stumble our way through poly classes! Special thanks to Singapore Poly for making this video possible! Follow Singapore Poly’s instagram @singaporepoly and #SPOH19 , #speye & #singaporepoly for more sneak peeks and behind the scenes! For more information on Singapore Poly's Open House, visit: http://openhouse.sp.edu.sg Follow The Smart Local on Social Media! https://facebook.com/TheSmartLocal https://facebook.com/TheSmartLocalTV https://instagram.com/thesmartlocalsg https://instagram.com/thesmartlocaltv Featuring (in order of appearance): Zhin Sadali - https://instagram.com/zxynpot Adria Tham - http://www.instagram.com/thambellina Fauzi Aziz - https...
Poly Studio X70 Demo Video
#Polygamy Valiant - Poly (Official Music Video) Valiant performing ‘Poly’ Produced by Diplomats Record / Zimi Entertainment http://vevo.ly/7y8E6q
POLY 학생들의 즐거운 캠퍼스 생활을 노래한 [POLY Song]에 율동을 더했습니다. 이제 [POLY Song]을 들으며 율동을 따라해 보세요. 더욱 즐거운 POLY 생활이 시작될 거예요!
Poly, from the Greek πολύς meaning "many" or "much", may refer to:
Don't you cry, don't you look so sad
We both knew somehow this day would come
I know you want what is best for me
And I need to see you smile
From where I started off to where I am
It's a million miles, I can't go back there again
But no matter where I go from here
You will be part of me from now on
For every door that opens up
When another has to close
You got to trust me now
Be strong and let me go
Watch me now as I go my way
The time has come
And I gotta say I'm not afraid
Watch me now, every step I take
I feel stronger, so much stronger
The road ahead is a mystery
Your love is here
Oh and I believe inside of me
Watch me now, I can stand my ground
I will be alright, yes I'll be alright
You were someone who believed in me
When I wasn't even sure of myself
And I always will remember how
You were always there to help
And I heard so many things from you
And I'm ready now to try them out in the world
Though it hurts too much to say goodbye
We both know (We both know)
There's no other way
I will feel your loving arms
When I'm out there in the cold
'Cause all of my thoughts of you
Will still be mine to hold
Watch me now as I go my way
The time has come
And I gotta say I'm not afraid
Watch me now, every step I take
I feel stronger, so much stronger
The road ahead is a mystery
Your love is here
Oh and I believe inside of me
Watch me now, I can stand my ground
I will be alright, yes I'll be alright
You will find me running back sometime
When I really need a guiding hand
We'll be closer than we were before
And I know that you will understand
I know you'll understand
Watch me now as I go my way
The time has come
And I gotta say I'm not afraid
Watch me now, every step I take
I feel stronger, so much stronger
The road ahead is a mystery
Your love is here
Oh and I believe inside of me
Watch me now, I can stand my ground
I will be alright, yes I'll be alright