Stiffness The effect that this additive has on the polymer in terms of stiffness is that the fillers are very useful because it makes the polymers very strong and stiff. This makes it hard to break. Service life The effect of fillers on polymers is that they are very beneficial because they don’t get ruined for a long time. Glass fillers are the most commonly used fillers in polymers. This is because they last longer and their service life is longer. Strength In terms of strength the fillers are put in the …show more content…
The effect that the additive have on the the polymers is that they are not that expensive. They are very cheap especially when making the polymer product. Stiffness The effect of this additive of the polymer in terms of stiffness is that it affects the polymer in a good way. This is because it makes the polymer stiff and more tough when it is made. Service life In terms of the effect of service life on the polymer, this additive has a long service life. Polyvinyl chloride is a substance that has this additive inside it. Due to this the additive makes the polymer stronger and makes the product last longer. Strength In terms of strength the effect the plasticizers have on the polymers is that the additive makes the polymer have a weak intermolecular force. As a result of this the polymers will be unstable an easier to handle. Due to this the polymer then can be remoulded and tougher and this will increase the polymers …show more content…
Cost The cost of this additive is not that high and it can easily be put inside in the polymer when the product is being made. Stiffness In terms of stiffness this additive is hard and stiff. This affects the polymers in a good way because it acts like a protective shield for the polymer to stop any polymer oxidation on the polymer. Service life The service life of the antioxidants is long but not that long. This is because if the additive starts to weaken due to the harmful polymer oxidation chemicals in the air then this could make the polymer properties to become brittle. Strength The antioxidants are very strong. They are made very strong so that they don’t break or get ruined due to polymer oxidation in the
Muscle endurance is the ability to perform a lot of repetitions against a given resistance for a long period of time. The combination of strength and endurance results in muscle endurance. Muscle endurance is used in may sports such as rowing, swimming, cycling, distance running, field hockey and American football. Normally, an endurance muscle program involves lifting about 12-25 repetitions of moderate loads. In some cases, this is inadequate for many sports such as boxing, canoeing and x-cross skiing.
Biomechanics is the overall topic that will be discussed throughout the presentation, this incorporates a brief discussion about water resistance, propulsion and buoyancy. Under lifesaving, appropriate techniques and the choice of stroke for the Timed Tow will be analyzed and justified.
Because of its ability to break down self-associative tendency of water , it may also reduce the number of water molecules entrapped between the polymeric chains, increasing the degree of postoperative polymerization In addition to post-curing increase in bond strength, the relative decrease in free water would eliminate or decrease the hydrolytic degradation of adhesive in or above the hybrid layer
Poly isobutylene, which makes the inner lining of a tire and also a basketball is one of the ingredients of gum base. Methyl Vinyl Ether-Maleic Anhydride Copolymer is very controversial over its safety
Figures 3a-d show the effect of polymerization time on %GY (Fig. 3a) ; %GE (Fig. 3b); %TC (Fig. 3c) and %HP (Fig. 3d) at four different temperatures ( 50 0 ; 60 0 ; 70 0 and to 80 0C ). It is evident that , as the reaction time became longer , all polymer yield , except %GE , increased. The polymerization time corresponds to 180 min. brought about the maximum percentages for the positively dependence of polymer criteria.
It consists of Kevlar and other polyamides LC polymers. This surfactant have a hydrophilic and hydrophobic part. In concentrated system, liquid crystal forms due to packing of micelles. This basically gives an idea about different polymers and possible attachments on polymers. An example of such a polymer is Kevlar and polyamides.
as viscose’s ability to combine with other fibers to create new fabrics easily) and disadvantages
The ingredients used in making slime contain fundamental additives that, when mixed together, cause the thick, gooey, slime every kid enjoys. Polymers are made from several smaller molecules joined by chemical bonds. The polyvinyl allows the mixture to feel slimy. Combing the polyvinyl and Borax together creates a chemical reaction. The mixture becomes cold, thicker, and elastic. This combination mixed together produces slime that is fun and safe for all ages.
The increase in the ionic group content in the chain will increases the viscosity of the PU dispersion. This happened due to an increase of the hydrophilic structure through the addition of more salt groups and urethane linkages. At the high-pressured application step, the viscosity should be very low so that the adhesive can be applied efficiently to the automotive body.
A polymer is a large molecule that is known as an organic compound. Polymers are used in many different ways to form different structures but mostly polymers are used to create various kinds of plastics. A polymer is made from the covalent bonding of smaller repetitive molecules. As seen in figure 1. These repeating molecules are built into chains, and different polymers have varied chain lengths. These smaller molecules which make up the polymer are known as monomers. Through the reaction of polymerization which generally requires a catalyst polymers are formed. Various Polymers are built of different types of monomers, some contain only one type of monomer whereas others can contain up to two or more monomers. These polymers are known as natural polymers, they occur in nature and then are extracted for use. Natural polymers are often water based, examples are silk,
Polymers are large molecules that are formed of many smaller molecules joined together as sub units, known as monomers. They portray a huge role in society as they tend to make up most plastics used ranging from plastic shopping bags to styrofoam. Polymers can be found naturally an example being DNA the building blocks of life but most usable polymers are man made (American Chemistry Council, n.d). The polymers in plastics widely used by society today are known as homopolymers, as they are the product of two or more identical monomers that have undergone polymerisation. However, here is an alternative form of polymer that is not as widely used called copolymers. Copolymers are constructed when two or more
[3] H. S. Milner-Brown, R. B. Stein, and R. Yemm. "The Orderly Recruitment of Human Motor Units during Voluntary Isometric Contractions." The Physiological Society 230th ser. (1973): 359-70. Web. 22 May 2014.
Other examples of polymers are present in our everyday lives. Water-resistant paints and varnishes derive from a family of synthetic polymers called acrylics. Polystyrene foam, or styrafoam, is used when making cartons to protect eggs, or making packing peanuts to cushion fragile objects for shipping. It insulates, so people put drinks in foam cups and coolers to keep the warm ones warm and the cold ones cold.
POLYMER RELATED FACTORS: Molecular weight: For linear polymers, mucoadhesion increases with molecular weight. A large molecular weight is essential for entanglement; however, excessively long polymer chains lose their ability to diffuse and interpenetrate mucosal surfaces. Concentrated dispersions are retained on the mucous membrane for longer periods. After application such systems spread easily, since they present rheological properties of a liquid, but gellify as they come in contact with the absorption site, thus preventing their rapid removal. Chain flexibility is critical for interpenetration and entanglement with the mucus gel. Increased chain mobility leads to increased inter-diffusion and interpenetration of the polymer within the mucus
Polyethylene terephthalate is used as textile fibres and we know them by the following names Terylene, and Dacron, to name two. It consists of a synthetic polymer that is made out of a purified terephthale acid or its dimethyl ester, dimethyl terephthalate and mono ethylene glycol. Today 18% of the market shares of all plastic materials produced is polymers from dicarboxylic acid and a diol. There are many applications and depends on the production and orientation of the polymer chains. Also used in textiles and food packaging, maybe you will recognise the trivial name, polyethylene terephthalate, PET. The annual production is about 40 million tonnes; of this 40 million tonnes 65% is for fibres production, 5% for film production, and 30% for packaging material. These polymers do not discolour in light and their melting point is high