Polymers

Bouncy balls are made up of Polymers, which are made up of many small units of monomers, that go through the process of Polymerization to become Polymers. People can see such polymers all around them like rubber, wool, silk etc. Polymers have unique properties that allow chemist’s and scientists to mix different types of polymers with each other to form new ones. In the lab Polyvinyl Acetate (PVAc), Polyvinyl Alcohol (PVA), and Sodium Borate were used to make and design the bouncy balls. The…

batch sample. Generally, to test the property change in the polymer by the influence of a filler/additive is done by processing several batches with different but gradual loading of the filler/additive. Here, we have to test the properties of nano Calcium Carbonate in the polymer matrix of polypropylene. For this, 12 batches are prepared by using the different size of filler by loading it at 5%, 10%, 15% and 20% by ratio in the polymer matrix. Ideally a 5kg of composite is compounded to test…

and carboxymethylcellulose etc. • Hydroxylpropylmethylcellulose (HPMC): Hydroxylpropylmethylcellulose is semi synthetic, inert, viscoelastic polymers, extensively used not only for mucoadhesion properties but also for its controlled release mechanism. It has been applied to deliver various drugs via different type of dosage forms. HPMC is a non-ionic polymer and lacking of proton donating carboxylic group which causes lesser hydrogen bonding than carboxymethyl cellulose. •…

polyurethane segments show high intersegment attraction such as hydrogen bonding and may be able to crystallize and form hard segments. In such polymers hard segments with Tg well above normal ambient temperature are separated by polyol soft segments, which in the mass are rubbery in nature. Hard and soft segments are arranged alternate along the polymer chain. Fig.7. Polyurethane chain configuration [32] 4.2.2. Polyurethane properties and advantages for product development Polyurethanes…

which increases the filler- matrix interaction, thus increasing the effect of the material properties [18]. According to Yang et al, nanocomposites have been shown to afford remarkable property enhancements compared to the conventional composite. Polymer nanocomposites with layered silicates and carbon nanotubes have attracted great interest for the improvement of structural properties and development of new materials with different functional properties [19]. Based on Potts et al, the…

2.1 Polydimethylsiloxane (PDMS) Polydimethylsiloxane (PDMS) own to a group of polymeric organosilicon compounds that are commonly stated as silicones. PDMS is optically clear, and, in general, non-flammable, non-toxic, and inert. PDMS is viscoelastic, meaning that at long flow times (or high temperatures), it acts like a viscous liquid such as honey. However, at short flow times (or low temperatures), it acts like an elastic solid such as rubber. In other words, PDMS will flow to cover the…

Spinning of Nylon Fiber: The turning of the nylon filaments is completed with dissolve turning. There are two strategies for liquefy turning: 1. Grid turning 2. Extruder turning. Lattice turning is utilized for the generation of better fibers. The nylon chips are made to fall on a hot matrix that melts the nylon pieces. The liquid nylon is pumped through a sand channel to the spinneret. The sort of fiber created relies on the quantity of gaps on the spinneret, the size and the state of the…

characteristics; plastics can be tough and rigid yet still flexible and can be opaque yet transparent. The building blocks of plastics are small organic molecules often known as monomers, which then join to other monomers creating long molecule chains called polymers in a process called polymerisation (Nobelprize.org, 2016). Bioplastics are expected to become the future of synthetic material, because of the simple fact that they are biodegradable, causes minimal harm to the environment and…

QUESTION: Give the Preparation, Properties and Applications of any four POLYMERS 1. Polyethenics ( Vinyl Resins) They are obtained by the polymerization of monomers containing the ethylenic bond (-C=C-) I. Polyethylene ( PE ) Polyethylene is one of the simplest and most inexpensive polymers. It is a waxy, chemical inert plastic. It a thermoplastic formed by the addition polymerization of ethylene. There are two types of polyethylene  Low Density polyethylene (LDPE) By using free radical…

The purpose of this investigation was to find a high regression rate fuel suitable for use as a mixture with hydroxyl-terminated polybutadi- ene (HTPB). Guanidinium azo-tetrazolate (GAT) is the compound that was the focus of our re- search. GAT is a salt containing a high per- centage of nitrogen. It has two conjugated ni- trogen rings, which are negatively charged, and a positively charged component consisting of nitrogen, carbon, and hydrogen. In addition to the high-energy content of this…