Gourt > Science > Technology > Materials > Polymers (4)
Polymer is a term used to describe molecules consisting of structural units and a large number of repeating units connected by covalent chemical bonds. The term is derived from the Greek words: polys meaning many, and meros meaning parts *. The key feature that distinguishes polymers from other molecules is the repetition of many identical, similar, or complementary molecular subunits in these chains. These subunits, the monomers, are small molecules of low to moderate molecular weight, and are linked to each other during a chemical reaction called polymerization.
Instead of being identical, similar monomers can have varying chemical substituents. The differences between monomers can affect properties such as solubility, flexibility, and strength. In proteins, these differences give the polymer the ability to adopt a biologically-active conformation in preference to others. (See self-assembly.) Identical monomers with nonreactive side groups result in a polymer chain that will tend to adopt a random coil conformation, as described by an ideal chain mathematical model. Although most polymers are organic, with carbon-based monomers, there are also inorganic polymers; for example, the silicones, with a backbone of alternating silicon and oxygen atoms and polyphosphazenes.
Polymer nomenclature
Polymers are typically classified according to four main groups:
- thermoplastics (linear or branched chains)
- thermosets (crosslinked chains)
- elastomers
- Coordination polymers
Polymers :: Chemicals
Resources :: Man made
Omg gw masi belom seperempat perjalanan! Save tempaatt! RT @CalvinaMartin: At irving.. Reading bout polymers.. T_T I hate polymersssss.. >:[
viranlly (viranlly liemena) Mon, 21 Dec 2009 00:47:13 -0000
Omg gw masi belom seperempat perjalanan! Save tempaatt! RT @CalvinaMartin: At irving.. Reading bout polymers.. T_T I hate polymersssss.. >:[
Kraton Performance IPO another blow to market: Kraton Performance Polymers Inc.'s initial public offering fell .. http://bit.ly/6FMCSL
babyboomer007 (Joy LIm) Mon, 21 Dec 2009 00:11:23 -0000
Kraton Performance IPO another blow to market: Kraton Performance Polymers Inc.'s initial public offering fell .. http://bit.ly/6FMCSL
Kraton Performance IPO another blow to market: Kraton Performance Polymers Inc.'s initial public offering fell .. http://bit.ly/6A1Wyo
InvestingGem (Investing Gem) Sun, 20 Dec 2009 23:35:10 -0000
Kraton Performance IPO another blow to market: Kraton Performance Polymers Inc.'s initial public offering fell .. http://bit.ly/6A1Wyo
Kraton Performance IPO another blow to market: Kraton Performance Polymers Inc.'s initial public offering fell flat... http://bit.ly/6A1Wyo
stockhobbit (Stock Hobbit) Sun, 20 Dec 2009 23:12:28 -0000
Kraton Performance IPO another blow to market: Kraton Performance Polymers Inc.'s initial public offering fell flat... http://bit.ly/6A1Wyo
@tinatran thermosetting resins r polymers that cant be reshaped nd dey decompose rathr dan gettin soft
Josica (Josica G) Sun, 20 Dec 2009 18:23:59 -0000
@tinatran thermosetting resins r polymers that cant be reshaped nd dey decompose rathr dan gettin soft
@tinatran proteins are polymers of amino acids
Josica (Josica G) Sun, 20 Dec 2009 18:14:50 -0000
@tinatran proteins are polymers of amino acids
The Macrogalleria - A Cyberwonderland of Polymer fun. Includes on screen polymer reactions. A wonderful learning tool.
Biodegradable Plastic Resin - University of Nebraska Institute of Natural Resources offers to supply information on a patented product made from starch.
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Biostable and biocompatible polymers - Abstracts of selected publications and patents dealing with biostable and biocompatible thermoplastic and segmented polyurethanes.
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Dow Chemical Polypropylene Resins - An intensive look at typical characteristics, shrinkage predictions and plastic part design for parts made with polypropylene resins.
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Elastomer Engineering and Testing - Consults or performs finite element analysis, stress strain, fatigue, crack growth, and tearing energy testing on elastomers or rubber materials and components.
Meta Description: [ Elastomer Engineering and Testing
consults or performs finite element analysis, stress-strain, fatigue, crack growth and tearing energy testing on elastomers or rubber materials and components. ]
Faraday Plastics Partnership - Based in the UK and are joint initiatives from the UK's Ministry of Industry (DTI) and the UK national research funding organisation (Engineering and Physical Sciences Research Council (EPSRC)). The Plastics partnership aims to promote and develop the plastics industry in the UK.
Friendly Packaging - About a project at the University of York that aims to produce and fully characterize a novel biocompostable plastic.
Photopolymer.com - A site for information and ecommerce on radiation-curable and imageable polymers. These polymers are used as photoresists, coatings, inks, adhesives, printing plates etc.
Plastemart.com - Provides information on plastics and environment, associations and institutions, books and publications, news and a discussion forum.
Meta Description: [ Indian website for plastics products, second hand plastic machines, news, raw material, prices, consultants, placement. ]
Polymer and Organic Flexible Displays - This page describes and links background information and recent developments in several key polymer and organic display technologies which are turning mechanically flexible displays into a reality.
Meta Description: [ eeProductCenter delivers a full spectrum of critical design information about the latest ICs and electronic components for engineers facing challenging, design-in decisions. eeProductCenter continuously reports new product news with analysis and insight to help you make more informed product/tech... ]
Polymer Chemistry Hypertext - An educational resource compiled by students at the University of Missouri-Rolla.
Polymer FEM - Forum for discussing constitutive models for polymers and their implementation in general purpose finite element programs.
Meta Description: [ The latest news about constitutive modeling and simulation of polymers. ]
Polymer foam case studies - Three case studies to do with polymer foam compression, packaging design and seating cushion design.
Meta Description: [ 3 case studies to do with polymer foam compression, packaging design and seating cushion design ]
Polymers and People - Article explores research, over 150 years, that has led to polymers use in medicine, like organ transplants.
Polymers in Automobile Industry - About polymers and their uses and possible uses in the automobile industry, written for a general audience.
Rubber Division - American Chemical Society - Provides for exchange of opinions, technical information and experience of those in the rubber and polymer-related industries.
Meta Description: [ Rubber Division, ACS, is a membership-driven trade association for the rubber industry, both academic and commercial, and specializing in technical meetings, education, and expositions. ]
Self Healing Polymer Research - Provides information about the self healing polymers research group at the University of Illinois. Contains publications in full text (PDFs) and a gallery including photos, animations and videos.
Meta Description: [ Autonomic healing polymer developed at the
University of Illinois at Urbana-Champaign ]
Surface Modified Silicone Rubber - A wet-chemical method generates a variety of functional groups in the surface of fromed silicone articles. This is the basis for bonding biologically active compounds, ionically and/or covalently.
Meta Description: [ Surface-modified (functionalized) silicone: the first step towards biocompatibility ]
Teflon - Links to technical resources and its applications .
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The 2003 BCC Conference on Flame Retardancy - Recent Advances in Flame Retardancy of Polymeric Materials, BCC Conference, June 2 - 4, 2003, Stamford, CT, USA.
Trends in Plastics - Facts, Trends, News about plastics. Semi-personal website developed by a senior member of two prestigious professional associations (the ACS and SPE), giving interesting perspectives on the business, materials and processes.
Meta Description: [ Trends In Plastics - The only site that brings you trends news facts about plastics ]
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