Search results “Syndiotactic polypropylene polymerization reaction”
Tacticity-Isotactic, syndiotactic, Atactic Polymer-Engineering Chemistry-1 Notes(CY6151)
Anna University Engineering Chemistry Notes-1(CY6151) Unit-1 Polymer Chemistry Properties of Polymer Stereospecific Polymer or Tacticity Isotactic, Syndiotactic and Atactic Polymer
Views: 16049 vijaya rajadurai
Tacticity and Coordination Polymerization
TACTICITY AND COORDINATION POLYMERIZATION There are three types of Polymers which depends on special arrangement on groups which are in making of Polymers: 1) Isotactic Polymers 2) Syndiotactic Polymers 3) Atactic Polymers
Views: 13487 vedupro
This video describes polypropylene structures, its production methods, properties and applications
A.5 Isotactic and atactic polymers (SL)
Understandings: Isotactic addition polymers have substituents on the same side. Atactic addition polymers have the substituents randomly placed.
Views: 1481 Mike Sugiyama Jones
Organic Addition Polymers 2. Production of HDPE
This short video takes a relatively simplistic look at the action of a Zeigler-Natta catalyst in the production of High Density Polyethene (HDPE). HDPE molecules have little branching, resulting in a more crystalline structure and higher melting temperature.
Views: 18569 FranklyChemistry
Degree of polymerization example problem
tutorial example problem showing how to calculate degree of polymerization in a nylon 6,6 sample with an average molecular weight of 250,000g/mol
Views: 3238 Taylor Sparks
Organic Addition Polymers 2. Polyphenylethene (polystyrene).
A short animation to show the addition polymerisation of phenylethene (formerly known as styrene). There is an accompanying video that shows the formation of polythene, pvc and polypropylene.
Views: 1367 FranklyChemistry
Mod-01 Lec-24 Polymer Stereochemistry and Coordination Polymerization (Contd.)
Polymer Chemistry by Dr. D. Dhara,Department of Chemistry and Biochemistry,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in
Views: 2081 nptelhrd
Mod-01 Lec-34 Structural Analysis of Polymers by Spectroscopic Methods
Polymer Chemistry by Dr. D. Dhara,Department of Chemistry and Biochemistry,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in
Views: 3366 nptelhrd
Polymerization POLYPROPYLENE
จัดทำโดย นางสาว ศิริธรฑ์ นาดี รหัส115610400397-4 POE56147 เสนอ ผศ.ดร. สมหมาย ผิวสอาด รายวิชา Polymerization Processing
Mod-01 Lec-23 Polymer Stereochemistry and Coordination Polymerization
Polymer Chemistry by Dr. D. Dhara,Department of Chemistry and Biochemistry,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in
Views: 5195 nptelhrd
Ziegler Natta Polymerization of Ethylene |Mechanism of Ziegler Natta catalyst| video in urdu | Hindi
Hiiii.....!!! welcome to all of you in #Easychemistrytutor. in this video we will talk about the ziegler natta polymerization of ethylene. plzzz support me in my journey of education just to do like, coments and subsrcribe the channel. thanks for watching...!!! also make sugessions for me in the coments box.
Recrystallization of polypropylene in polystyrene / polypropylene blend
A blend of polystyrene (PS) and polypropylene (PP) was heated to 140°C to melt the syndiotactic PP and then cooled at a constant rate while imaging at one frame per minute. As the sample cools, the continuous PP phase first nucleates and then forms partly ordered, semicrystalline regions. Some of the regions form on top of the PS spherical domains. Imaged with the Cypher ES AFM; scan size 4 μm.
Views: 1001 AsylumResearchVideo
Ziegler Natta catalyst
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Views: 10436 STUDY CORNER chemistry
Melting and recrystallization of a sPP-PS polymer film
This movie shows a polymer thin film consisting of syndiotactic polypropylene (sPP) and polystyrene (PS) that was imaged as a function of changing temperature on the Cypher ES AFM using blueDrive photothermal excitation. The scan size is 3 µm and the data channel shown is phase because it shows the most contrast. The round, isolated domains are PS and the continuous matrix around them is the sPP. Note that the melting temperature of sPP is ~ 130-170°C while the melting temperature of PS is ~240°C. The movie starts with the sample at ~60°C. It is then slowly heated to ~135°C, during which time you can observe the PP crystallites melt, diminishing in size and forming a melted layer. You can actually see the high motility of the crystallites in the melt. Notably the heating is stopped before the sPP is fully melted and the sample is then slowly cooled. The remaining crystallites act as nucleation sites, recrystallizing and growing. Once the temperature has returned to 60°C, you see larger features appear. Note that the recrystallization occurs much differently if the sPP is fully melted. This case can be seen in another movie here http://www.asylumresearch.com/Gallery/Movies/Movie23.shtml.
Views: 1929 AsylumResearchVideo
Polypropylene Polypropylene enjoys wide application in technology engineering. This is a synthetic thermoplastic non-polar polymer classified as polyolefin. It is the product of propylene polymerization. Polypropylene is a solid white material with the chemical formula of C3H6. Propylene polymerization results in polypropylene linear molecule whose building blocks include -CH2-CH- bond with CH3 methyl side group. According to the methyl group position in the polymer chain, polypropylenes fall under: atactic polypropylenes whose methyl groups are located randomly at both sides of the polymer chain; syndiotactic polypropylenes whose groups have alternate positions along the chain; and isotactic polypropylenes whose all methyl groups are located on the same side of the polymer chain. Such polypropylenes are 50% more rigid and 25% harder than atactic polypropylenes. Polypropylene's physical, chemical, mechanical and electric properties greatly depend on the macromolecular structure. Polypropylene is marked as double-P both in Cyrillic and Latin alphabet. Polypropylene is a plastic material demonstrating high impact and cross-breaking strength. It is wear-resistant and has good electric insulation properties within wide temperature ranges. It is also chemically stable and water-resistant. Polypropylene products are manufactured based on all thermoplastic material processing technologies. Polypropylene finds wide application in the industry. It is used to produce packaging and car components, case works and pipelines. It is also widely used in electronic engineering. Polypropylene is used to produce packages to a lesser extent, however, than polystyrene and ABS resins. But unlike the latter, polypropylene packages can stand load impacts and are more resistant to abrasion damages. That's why they can be used under unfavorable environment. Polypropylene is used as a dielectric material in capacitors, for instance, in Russian K78-2 capacitors or as electric insulation. Recently, polypropylene has earned a great deal of popularity as internal insulators in high-voltage cables and has become a good substitute for polyethylene.
Views: 23571 ChipDipvideo
Polymeric Structure
This lecture explains about the molecular weight calculation in polymers, physical states of polymer, tacticity.
Zieglernatta catalyst,Organic name reaction no~59,Mr.Pappu Bhowmick
A Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, is a catalyst used in the synthesis of polymers of 1-alkenes (alpha-olefins).
Understanding polymerization
This video is about understanding the polymerization of polythenes. #breakthroughjuniorchallenge
Views: 313 Nathalie White
Polymerization mechanism with alkene addition Reaction #7
The mechanism of alkene addition polymerization using an acid catalyst is worked out. Additionally examples of polymer and monomers are shown to show the connection between a styrene and a polystyrene structural representation as well as polyethene + ethene and polyvinyl chloride and vinyl chloride. More reaction mechanisms and organic chemistry/IB chemistry resources can be found here: https://sites.google.com/site/thechemistrytranslator/chemistry---milam-plymouth/ib-chem-milam-hl
Views: 6272 Scott Milam
cationic polymerization
Views: 21256 sonny -
Polymer Molecular Weight
Calculates the number average and the weight average molecular weight from a polymer molecular weight distribution. Made by faculty at the University of Colorado Boulder Department of Chemical and Biological Engineering. Check out our Materials Science playlist at http://www.youtube.com/playlist?list=PLC9CE6BFBB0D003CD
Views: 71284 LearnChemE
Crystallinity in Polymers
Crystallinity in Polymers
Classification Of Polymers (Part -2)
3)Classification on the basis of Monomers:- According to number of monomers, Polymers are of two types. a) Homopolymer b) Co-Polymers a) Homopolymers:- Polymers which are formed by repeated combination of only one type of monomer,are called homopolymer. Examples are :- Polyvinyl chloride, Polyethylene, polystyrene, poly vinyl acetate, polypropylene, Teflon etc. b) Co-Polymers- These are the Polymers which are obtained by the repeated combination of two or more type of monomer. Examples are- BUNA-S, BUNA-N etc. 4) Classification on the basis of Tacticity or configuration:- Tacticity means orientation of side group around the main backbone chain in three dimensional structure of a polymer. There are three types of Tacticity. a) Atactic Polymers b) Syndiotactic Polymers c) Isotactic Polymers a) Atactic Polymers:- When the side group at arranged in an irregular random fashion, then the polymer is Atactic. b) Syndiotactic Polymers:- Arrangement Of side groups in is alternating fashion. c) When the side group are all on the same side of the chain,then the polymer is isotactic. Follow me on Instagram:-https://www.instagram.com/ruchu305/ Facebook:-https://www.facebook.com/ruchu.singh.9
Views: 365 Ruchi Upadhyay
XII 15.2 Types  of Polymerisation
complete class room programs for class XI and XII
Views: 14579 shaillee kaushal
A 5.4 Polymer tacticity
IB chemistry Option A: materials
Views: 1500 Rostam Afshinnekoo
Polymers: Introduction and Classification
This lecture introduces to the basics of Polymers, their classifications and application over wide domains.
Syndiotactic PP
Views: 307 pcpainter1
Mod-08 Lec-02 Polymers:Polyolefins,Polyethylene,Polypropylene Polystyrene
Chemical Technology - I by Dr. I.D.Mall,Department of Chemical Engineering,IIT Roorkee.For more details on NPTEL visit http://nptel.ac.in
Views: 5320 nptelhrd
Polymer Names, Types and Classifications
https://engineers.academy/ This video introduces different polymers and explains how their structures can be determined. In addition, you will learn about different types of polymers including linear, branched and cross-linked polymers, before being shown how to determine whether polymers are crystalline or amorphous. To learn more about our General Engineering HNC please visit: https://engineers.academy/product/level-4-general-engineering-hnc-full-online-distance-learning-qualification/
Views: 204 Engineers Academy
Views: 3158 Advanced Chemistry
15. Metals and Catalysis in Alkene Oxidation, Hydrogenation, Metathesis, and Polymerization
Freshman Organic Chemistry II (CHEM 125B) Alkenes may be oxidized to diols by permanganate or by OsO4 catalysis. Metal catalysts provide orbitals that allow simultaneous formation of two bonds from metal to alkene or H2. Coupling such oxidative additions to reductive eliminations, provides a low-energy catalytic path for addition of H2 to an alkene. Such catalytic hydrogenation is often said to involve syn stereochemistry, but the primary literature shows that addition can be anti when allylic rearrangement occurs on the catalyst. Similar oxidative/reductive cycles operate in olefin metathesis and metal-catalyzed polymerization. Careful catalyst design allows control over polymer stereochemistry (tacticity). Polymerizations catalyzed by free-radicals or acids typically lack stereochemical control, but there are ways to control regiochemistry and chain length. Latex, a natural polymer, coagulates to form a rubber ball. 00:00 - Chapter 1. Alkene Dihydroxylation 04:28 - Chapter 2. Catalytic Hydrogenation of Alkenes: Oxidative Addition, Reductive Elimination 15:08 - Chapter 3. Catalytic Hydrogenation of Alkenes: Stereochemistry 25:50 - Chapter 4. Olefin Metathesis, Polymerization, and Tacticity 39:00 - Chapter 5. Radical Polymerization 43:16 - Chapter 6. Electrophilic Oligomerization and Polymerization and Rubber Complete course materials are available at the Open Yale Courses website: http://oyc.yale.edu This course was recorded in Spring 2011.
Views: 7554 YaleCourses
General Chemistry Lecture 171 - Ziegler-Natta Polymerization (Synthetic)
Free radical polymerization of ethylene produces a low density polymer with side chains of one to five carbon atoms. Ziegler-Natta polymer produces a more rigid and linear polymer. Title: General Chemistry Lecture 171 - Ziegler-Natta Polymerization (Synthetic) Instructor: Prof. I. Z. Khan Subscribe: https://www.youtube.com/channel/UCeyf7bV3FQbh5VO5P5cJWQQ Facebook: https://www.facebook.com/EducationPointOnYouTube
Views: 516 Education Point
Global Atactic Polypropylene Report Market Size and Forecast 2021
Global Atactic Polypropylene Report-Market Size and Forecast 2021 http://www.gosreports.com/global-atactic-polypropylene-market-research-report-2017/
Views: 19 Bill Lau
Polymer Stereochemistry and Coordination Polymerization
Subject: Chemistry and Biochemistry Courses: Polymer Chemistry
Tacticity Meaning
Video shows what tacticity means. The relative stereochemistry of adjacent chiral centers within a macromolecule. Tacticity Meaning. How to pronounce, definition audio dictionary. How to say tacticity. Powered by MaryTTS, Wiktionary
Views: 1578 ADictionary
“Coordination polymers and metal-organic frameworks: general topological classification scheme”
At webinar general approach to structure topological classification of coordination polymers structures of any complexity was presented. The webinar program included analysis of chemical bonds, design of topological representation of coordination networks, search for polynuclear and polymer structures.
Views: 1477 SCTMS