Advantages Of Biodegradable Polymers

Three-dimensional (3D) printing, is taking a huge role in major innovations within many fields these days such as the engineering, education, and medical. 3D printing in the medical field promise with many fascinated achievements that no one thought that they will be possible someday. 3D printing technology is rapidly becoming more and more common among doctors and medical researchers. Different professionals from different fields advance the use of 3D printing. That allows patients from different countries to use 3D printing technology to experience better health options. 3D printing technology can be used in many ways in the medical field such as printing drugs. 3D printers can be used to make chemical combinations. A patient will be able to print his medicines at home, by putting

To keep it as simple as possible, (K.I.S.S.) this topic involves the study of: 1. POLYMERS FROM PETROCHEMICALS & BIOMASS

The most common form of polyethylene is petroleum based or olefins based; as before mentioned polyethylene compounds have a wide commercial applicability and are made from non-renewable resources (Harding, Dennis, von Blottnitz, Harrison, & S.T.L., 2007). Its manufacturing processes are regarded as energy intensive and release significant amount of CO2 and heat into the atmosphere (Broderick, 2008). Next a little more detailed description of polyethylene’s production processes will be presented, with a focus on the way the material inputs are extracted and synthesized.

Dynamic mechanical analysis showed that increasing fiber content provides an improvement in the rigidity of the composites. Cardanol modified resol reinforced nanoclay composite was prepared and mechanical properties of the final composites were improved by doping a 6 wt% of nanoclay in cardanol modified resol (CMR) into the epoxy matrix. The results show that a 15 wt% of CMR in epoxy is a most suitable ratio (Nguyen et al 2007).

For bio-composite, is a composite material formed by a “matrix” and “reinforcement” of natural fibers. These materials are often mimic the structure of the living materials involved in the process keeping the strengthening properties of

In modern times, there are numerous materials used to make the everyday necessities we need in life such as our phones, clothes, shoes, plastic bags, and many more. However we could narrow the materials down to metal-based products, polymer-based products/ plastics, and cellulose-based products/paper. To narrow things even down further so that we could have an argument, plastic and cellulose could both be used to make the same type of material such as containers for juice, containers for food, chairs, tables and many more. With this, we could now compare if plastic or paper is the better material to make our basic necessities. I would say that plastic would be better because of its durability, energy efficiency in making plastics, and the ability to mold plastic.

Both natural and synthetic polymers are a vital part of our daily lives. Natural polymers are found in rubber, skin, hair etc. Synthetic polymers are found in nylon, polyester, plastic, chewing gum etc. This lab is demonstrating the properties of the common synthetic polymer polyvinyl alcohol (PVA). It is often used as a thickener or stabilizer cosmetics but also in paper cloths, films and cements.

Several attempts have been made to improve the properties of PLA. Researchers have approached surface modifications to enhance the mechanical properties, especially toughness, processability, degradation behaviour and crystallization11. By the use of surface modification techniques different reactive groups such as –COOH, -OH, and –NH2 can be introduced on the surface of PLA. Grafting technique was utilized by Spinella et al.12, to improve the mechanical and barrier properties of the nanocomposites. PLLA based nanocomposites with PMMA modified CNCs showed higher storage modulus

Design The brazing material seals and holds the plates together at the contact points ensuring optimal heat transfer efficiency and pressure resistance. Using innovative design technologies and wide verification guarantees the highest performance and longest possible service life.

There are many accidental scientific discoveries in history, a very pertinent one being polytetrafluoroethylene (PTFE) or Teflon. It is most popularly used on non-stick cookware, but is also used as a stain repellant, in the production of artificial body parts, as an electrical wire insulator, and as pipe lining to prevent corrosion, among others. Invented by Dr. Roy Plunkett, PTFE pushed the limits of innovation and has been used to improve human health. In recent years, controversy has risen as to the environmental effects PTFE has during production, and this has become a rising issue that is still being researched. While PTFE is considered serendipitous, a high degree of background knowledge on its components was needed in order to make conclusions as to what

For the purpose of creating dentures, many materials have thus far been used, amongst these, poly methylmethacrylate (PMMA) have become the most popularly used materials (Machado et al., 2007). However, this material does come with its set of drawbacks. Its moderate to low fracture strength is the most important drawback (Mumcu et al., 2011). The population that most commonly requires the use of dentures are the older age groups. In view of this, it can be stated that older people have reduced muscular control and hence results in accidents which cause fracture of the dentures (Stipho & Talic, 2001). One way this limitation of the PMMA can be overcome is to add metal frameworks to the denture structure. But even so, drawbacks such as metal corrosion, allergy to the metal, deformation, and also aesthetic concerns do exist. Besides this, there is also difficulty in the casting

Song JH, (2009) states that “Many different materials are used for packaging including metals, glass, wood, paper or pulp, plastics or combinations of more than one material as composites” (p 364). What this means is that most of the packaging materials we use for packaging contain products that are very hard to de compose and end up in landfills. In order to achieve bio degradable packaging we should consider bioplastic polymers which “are generally still much higher than that of their traditional plastic counterparts” (364). Bioplastic polymers cost much more than regular polymers we use but, if we can help our planet and company become more environmental friendly, we should take that step and use bioplastic polymers for our

This procedure involves the use of microorganisms being used as a catalyst. The lactic acid is heated with an acid catalyst to form a dimer which then converts to lactide, a hexagonal ring with two ester groups this reaction is called condensation. Typically tin octoate or stannous octoate are used as catalysts for this reaction. This lactide acid undergoes polymerisation to make PLA. Firstly the monomers must have a hydroxide (OH) group; referring to the diagram above this is evident. It is at this point that the other monomers are bonded to this group, this results in the production of H2O. When the monomers connect, water is produced and removed resulting in a carbon, oxygen and carbon bond. Many of the monomer chemically bonded together forms a polymer and in turn a

I found this chapter to be the most interesting so far, it fueled my concerns regarding the excessive use of plastic. Some of the statistics Feinkel shares are frightening, such as chemist Raymond Giguere’s, comparison of a year’s production of polyethylene equaling the mass of all the men, women and children in the United States. (62) This is alarming as we cannot continue to produce these materials on such a mass scale without considering the implications it has on our planet. Some forms of polyethylene take hundreds of years to degrade, this means the mess we make now will be left for generations to come to clean up. I have actually made a stand in my house, as the Mum of two young boys I no longer buy them those cheap, plastic toys that

PHAs can be divided into two group that are included short-chain-length PHAs (sCL-PHA) with 4 to 5 carbons in one repeating hydroxyalkanoate unit, and mediumchain- length PHAs (mCL-PHA) with 6 or more carbons in monomeric constituents. PHB is the main polymer of the polyhydroxyalkanoates family, however different monomers, and thus (co)polymers, could be obtained because there are the different carbon substrates and the different metabolism of the microorganism. PHAs with 150 different types are largest group of natural polyesters