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Each monomer is incorporated into the polymer is known as a repeat unit or monomer residue. The physical properties of a polymer are strongly dependent on the size or length of the polymer chain. Some of the polymers and their precursors are via radical mechanism or necrophilia substitution.
In this experiment, polystyrene, nylon 6, 10, and cellulose triplicate were prepared by different mechanisms. Polystyrene was generated via radical mechanism from styrene. Nylon 6, 10 was generated from 1, 6-hexadecimal and sebaceous chloride with the loss of HCI via necrophilia substitution.
Cellulose triplicate was generated by mixing cotton balls and acetic anhydride with acidic condition under heating. Materials: Styrene, 1 M Noah solution, Cacao(s), xylem, t-butyl probationer, methanol, 5% aqueous solution of 1 , 6-hexadecimal, Noah(s), 5% sebaceous chloride in hexane, glacial acetic acid, concentrated HOSES, cotton balls, acetic anhydride, CHICHI Procedure: For the synthesis of polystyrene, 10 ml styrene and 20 ml of 1 M Noah solution was placed in separators funnel and they were shaded for several times.
Aqueous layer was discarded. The styrene layer was washed with water and dried with Cacao(s). The styrene was placed in 100 ml flask and 25 ml xylem and 7-8 drops of the t-butyl probationer was added. The reaction mixture was refluxed for 30 minutes. The solution was cooled to room temperature. Half of the mixture was poured into a beaker with 100 ml methanol.
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The white precipitate was collected using suction filtration and dried. A small amount of remaining polystyrene solution was poured onto a watch glass to observe the film.
Synthesis Of Dulcin
For the synthesis of nylon 6, 10, 10 ml of a 5% was laced in a 50 ml beaker. One pellet Noah was added with swirling to dissolve. 10 ml of 5% sebaceous chloride in hexane was added carefully to the beaker. The interface (Nylon 6,1 0) was pulled out between organic and aqueous layer with a bent spatula. The layers were then stirred vigorously to obtain a ball of nylon and dried. For the synthesis of cellulose, 5 ml of glacial acetic acid, 1 drop of con. HOSES and 1 Goff cotton balls was added was added in a stopped conical flask maintained at 70-ICC water bath for 20 minutes.
Acetic anhydride (5 ml) as then added to the re-stopper flask and was placed in water bath with occasionally stirring for 20 min. 15 drops water was added to the flask and the unstopped flask was placed in water bath for 5 min. 50 ml water was added to the solution. Cellulose triplicate was collected by suction filtration which was washed with water. 18 ml CHICHI and 2 ml methanol were mixed and heated to a boil. Cellulose triplicate was added to obtain saturated solution and the beaker was removed from heat. Some anhydrous Nassau was added.
The solution was filtered onto a water glass producing a film from the surface. Result and Discussion: For part A (synthesis of polystyrene), two layers were observed when styrene and Noah(aqua) were added to a separators funnel for extraction. The upper layer was yellow and lower layer was colorless. Same result was observed when washing with water. During the reflux, solution was changed from pale yellow to colorless. After reflux, a big white precipitate was formed when methanol was added. The product was adhered on the surface of filter paper during suction filtration.
From the watch glass, a colorless film of polystyrene was observed. For part B (synthesis of Nylon 6, 10), when sebaceous chloride was added to Noah in 1, 6-hexadecimal, two layers was generated with little gas. Little heat was also produced. The interface between organic layer and aqueous layer was milky. The nylon 6, 10 was white strands. For part C (synthesis of cellulose triplicate), after acetic anhydride was added to the mixture and warmed by water bath for 20 miss, the cotton balls were dissolved to orange-brown solution.
The white precipitates were produced after 1 5 drops of water for hydrolysis were added. After adding about 50 ml of water, he white-grey cellulose triplicate precipitates were generated. After cellulose triplicate was added to the mixture of CHICHI and methanol, the solution changed from colorless to pale brown. After some anhydrous Nassau were added, the solution became like glue. The white film was produced from the surface when the solution was filtered. In part A (polystyrene), Noah was added to remove inhibitor from styrene in order to undergo radical mechanism.
It is because in order to prevent the styrene from popularizing during storage, the chemical 4-tablecloths is added nice it is a radical inhibitor (also known as a good chain terminator). Some inhibitors may be polar which can be dissolved in Noah. Water was then added to remove excess Noah in the solution. Xylem was added as a solvent to dissolve polystyrene as both of them are organic. But the polystyrene cannot be dissolved in methanol so after that some methanol was added during experiment, the white polystyrene was precipitated out.
The colorless clear film adhered on the filter paper appeared because popularization occurs causing the solution to thicken and the viscosity to increase. Synthesis of polystyrene: The formation of radical initiator: Overall: Styrene polystyrene t-butyl probationer acts as radical initiator because it contains -0-0- group which is very unstable and reactive. Polystyrene was formed a large molecules (styrene) composed of repeating structural units. Synthesis of Nylon 6, 10: The synthetic polymers are classified by their method of synthesis. The synthetic method of polystyrene is chain-growth whereas that of nylon is step-growth.
When mixing Noah and sebaceous chloride, two layers were formed. During the axing, the heat was produced. The formation of heat is due to the formation of amide bond, which is exothermic. The nylon 6, 10 was formed in the interface which was milky. Because of the way polypeptides are formed, nylon would seem to be limited to unbranded, straight chains. The nylon 6,10 can form H-bond due to amide group so the textile is very tough. Cellulose triplicate, also known simply as triplicate, CAT and TACT, is manufactured from cellulose and a source of acetate esters, typically acetic anhydride.
The triplicate is derived from cellulose which come from the starting trial, cotton balls in this experiment, via activation mechanism. The cellulose acetate is dissolved in a mixture of deceleration and methanol for spinning. Cellulose is mainly obtained from wood pulp and cotton. For the process of generation of cellulose triplicate, the glacial acetic acid and con. HOSES were used to provide acidic medium for the action of acetic anhydride. When adding acetic anhydride, the cotton balls were dissolved into brown glue solution. It is because activation occurred.
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