Junior high chemistry organic polymers have performance molecules

Organic polymer compounds are compounds formed by the aggregation of a class of molecules with high relative molecular weight, also known as polymers, macromolecules, etc. Generally, molecules with a relative molecular weight higher than 10,000 are called polymers. Polymers are usually made up of 103 105 atoms linked by covalent bonds.

Because polymers are mostly made by polymerization of small molecules, they are also often referred to as polymers or polymers, and small molecules used for polymerization are called "monomers".

Small organic molecules are a class of carbon-containing compounds (except for carbon oxides, carbonic acid, carbonates, cyanide, cyanide, oxycyanate, cyanate, thiocyanide, metal carbides, etc.) called organic compounds. The molecules that make up organic matter are called organic molecules.

High refers to a large number, in fact, if according to the name, you can't distinguish, only memorize it, it's very important, the high school entrance examination may be out of the blank 1 or 2 questions, note, elemental matter is not organic or inorganic, because organic matter refers to organic compounds, I wish you a good score in the high school entrance examination.

The relative molecular mass is too large, and this junior high school will not talk about it very carefully, and the high school entrance examination is generally not examined.

Debriefing report of middle and senior management.

Name of departmental position.

The focus of the department's business strategy. Plan. Scratch.

Finish. Yes. Feeling. Key Performance Indicators and Metrics Actual Completion How it was completed or why it was not done.

Plan to adjust the tube. Reason. Change.

Further Project Current Program Improvements Completion based on facts and figures.

Departmental objective management and facilitation of corporate decision-making.

Culture & Team Building.

Process management and departmental collaboration.

Employee coaching and training.

Performance Improvement Performance Improvement Self-report.

Self-assessment Outstanding Good Satisfied Qualified Needs improvement.

Signature of the person being rated: Date.

The evaluation team evaluation is based on the evaluation criteria, and the evaluation is made against the work results and expected goals, and the difficulty of responsibility is duly considered.

Outstanding, Good, Satisfied, Qualified, Needs Improvement.

Evaluation team evaluation.

Signature of the Leader of the Evaluation Team Date.

Composed of "c h o n s and other elements. c h must be included.

Why is there an n after the chemical formula - to indicate nitrogen-containing organic compounds?

What is the difference between it and a performing molecule: the molecular weight is different.

Micro Explanation: What is the best explanation. It's not structural chemistry. It is only the length of the molecular chain formed. Polymers can be obtained by polymerization of small molecules.

It is an inorganic non-metallic material.

It is an inorganic polymer and belongs to the silicate class.

A new achievement in polymer chemistry - "polyisomer".

Eastman has been trial-producing new polymer compounds with olefins in recent years, called "polyallomers". The name is derived from the Greek words poly (for aggregation), allos (for heterologous), meros (for part), etc. Indicates the chemical composition of this polymer compound, which is not a single monomer, but can include two or more monomers.

This is what makes it different from the oriented polymers that Professor Nata discovered. This method of polymerization is called "allomerization", and the term encompasses the idea that the composition of the polymer can be varied, while its crystalline shape is fixed.

Eastman has used decene to produce new polymer compounds in recent years, which are called "polyallomers". The name is derived from the Greek words poly (for aggregation), allos (for heterologous), meros (for part), etc. It indicates that the chemical ancestor of this polymer compound is not a single monomer, but can include two or more monomers.

This is where it differs from the directional polymers that Professor Throwa discovered. This method of polymer polymerization is called "heterogeneous polymerization" (all. -merization), which consists of:

The coarse fraction of the polymer can be varied, while the shape of the fine crystal is fixed. This is different from the general "co-gathering". Regarding the "polymerization method of polyisosplit knife, because of the patent relationship of Shen Lotus, it has not been announced so far.

However, the first batch of "polyisosplit" plastics using ethylene and propylene as raw materials have been released in the spring of this year. According to indigo, this plastic can combine the original properties of polyethylene and polypropylene, and in some respects, it is better than the polymer of single consumption. For example:

It is superior to polyethylene in terms of fluidity, softening point, hardness, flexural strength, molding performance, etc., and is better than ordinary polypropylene in terms of embrittlement point and impact strength. According to indigo, other kinds of ethylene and propylene can also be used to make similar "polyisomers". For the new composition of this polymer compound.

c Because the grocery bags are made of polyethylene plastic.

c Polyvinyl chloride is toxic and cannot be used to package food.

d Thermosetting means that it is not deformed at very high temperatures, and it is obvious that the iron shell can still maintain its original shape at a temperature of more than 1,000 degrees, which meets the conditions.

d. Plastic parts of the iron. Usually the harder is thermoset

Organic polymer materials are divided into natural polymer materials and synthetic polymer materials, cotton, wool, natural rubber belong to natural polymer materials, and plastics, synthetic rubber, synthetic fibers, adhesives, coatings, etc. are synthetic polymer materials. New organic polymer materials include polymer membranes, biomimetic polymer materials, intelligent polymer materials, etc.

Natural starch, cellulose, protein, rubber, silk. Synthetic ones are, synthetic rubber, plastic. coatings, etc., such as polyethylene, polyvinyl chloride, polystyrene, styrene rubber, phenolic resin, etc.

The liquid crystal material itself is an organic polymer material. Here are the molecular structures of several liquid crystals:

Organic polymer materials: macromolecules with multiple repeating monomeric units.