1. Objective 1)
PVA(poly(vinyl alcohol)) is prepared by hydrolysis of PVAc(poly(vinyl acetate)), which is synthesized by emulsion polymerization of vinyl acetate.
2. Theory
1) Monomer 7)
A monomer is an atom or a small molecule that may bind chemically to other monomers to form a polymer. The term "monomeric protein" may also be used to describe one of the proteins making up a multiprote
Measurement of Density
The mass is normally measured with an appropriate scale or balance.
The volume may be measured directly (from the geometry of the object) or by the displacement of a fluid.
Hydrostatic weighing is a method that combines these two.
2. Specific Gravity
It is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference materia
Objective
We synthesize ethyl acetate from acetic acid and ethanol by esterification using sulfuric acid as a catalyst
Acetic Acid+Ethanol Sulfuric Acid ->Ethyl Acetate
Theory
1. Esterification
2. Reaction path of the Synthesis of
an Ethyl acetate
1.Tiltle
Synthesis of PVAc and PVA
2.Objective
PVA(poly vinyl alcohol) is prepared by hydrolysis of PVAc, which is synthesized by emulsion polymerization of vinyl acetate.
3.Theory
◇ Background
-PVA
Polyvinyl alcohol has excellent film forming, emulsifying, and adhesive properties. It is also resistant to oil, grease and solvent. It is odorless and nontoxic. It has high tensile
purpose
CdS 양자점의 합성과 특성화는 많은 개념들과 기술들을 도입하고 극적으로 설명할 수 있다.
형광 나노 입자 CdS quantum dot을 조합해보고 quantum dot의 의미와 형광의 원리를 알아본다.
Theory
양 자 점 (quantum dots)
양자점의 특징
양자점의 성질
양자점의 예
나노 입자로 만드는 이유
양 자 점
◎ Date – 2011.04.06 (Wed)
◎ Principle
1. HPLC (High Performance[Pressure] Liquid Chromatography)란 무엇인가?
이동상에 액체를 쓰는 액체 크로마토그래프의 일종으로 고압 LC(high pressure LC), 고성능 LC 등으로 말하는 경우도 있다. 보통 HPLC로 불리며 액-액, 액-고, 이온교환, 겔 침투 크로마토그래피 4종류로 분류
4) 유동화 조건
접촉 분해촉매와 같은 미세한 입상 물질을 조금 채운 수직관을 생각하자. 이 관의
상부는 열려 있고, 하부에는 다공관이 있어서 촉매 층을 지지하고 전체 단면에서
흐름을 균일하게 분포시킨다. 이 분산 판 밑에서 공기를 저속으로 도입하면,
입자운동을 일으키지 않으면서 위로 올라
density to be measured accurately by reference to an appropriate working fluid, such as water or mercury, using an analytical balance.
· The Sink-and-float method
Depending on the weight of solid particles, the raw material of the group divided into two or more research or a specific portion of the configuration elements for the purpose of separating particles do the test methods.
3. Experiment & Procedure
3-1 Reagent
- Water, 수돗물(15℃)
3-2 Apparatus
- single media deep bed filter column
- manometer
- mass cylinder
- thermometer
- stopwatch
3-3 Procedure
1) 실험에 사용할 여재(모래)를 준비한다.(세척 및 이물질 분리)
2) 모래를 건조시킨 후, 체 거름을 이용하여 입자 크기를 잰다.
3) 공극률(P
Objective
Purpose of this experiment
Understand the seperation principle of chromatography and identify the metal ions in mixture using paper chromatography
Principle of Chromatography
The stationary phase
Liquid or Solid used in absorbent in chromatography
The mobile phase
Liquid or gas moving through the stationary phase in chromatography