Theoretical amine value calculation

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Electronic Pipettes. Pipette Tips. High-throughput Pipetting. Liquid Handling Equipment. Pipette Management.Currently 2. Rating: 2. The amine value is a analytical characteristic number which has no direct relation to the crosslinking mechanism.

The amine value identify the primary, secondary and tertiary amines. Important for the reaction with epoxy resins are only the nitrogen bond hydrogenatom of the primary and secondary amines. The hydrogen equivalent is the calculation of the molecular weight of the polymanine divided by the amount of the active hydrogen atom.

Active hydrogen atom is the one which is connected with a nitrogen. Currently 0 out of 5 Stars. Currently 3 out of 5 Stars. Please wait. This advertisement will close after 20 seconds or click here to close. This advertisement will close after 60 seconds or click here to close.

Quick Links. EC Newsletter. Video archive. Media Information. Search text:. Login Register. Amine hydrogen equivalent weight. Sunday 02 September am Please let me know the relationship between amine hydrogen equivalent weight and amine value. Log in or create a user account to rate this page.The equivalent weight eq. Its concerntration is measured by weight percent NCO.

The molecular weight mol. A ratio of 1. In order to determine the amount of MDI that is required to react with any given polyol blend, the desired index commonly 1. Assumptions for simplifying the calculations are also not consistent. Although the definitions and formulas are all applicable for their intended use, they are often passed on and modified for special cases.

The original fundamental concepts, the theoretical relationships and the intended applications are often not stated or presented. This inevitably has created confusion and misuse. It has also hampered proper field work evaluations and comparisons. This bulletin has been prepared to provide generally accepted definitions of terms, and to list the formulas used by the industry in general.

theoretical amine value calculation

The concepts, assumptions and modifications are given. Sample calculations are also shown, for clarification. Click here for the complete article. Reference: Technical Center: Guide to urethane calculations. Huntsman International LLC, Click here to suggest a resource for the Virtual Technical Library.

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theoretical amine value calculation

Remember Me. Back Equivalent Weight The equivalent weight eq. Polyol mol.The acid dissociation constant pK a is among the most frequently used physicochemical parameters, and its determination is of interest to a wide range of research fields. We present a brief introduction on the conceptual development of pK a as a physical parameter and its relationship to the concept of the pH of a solution.

This is followed by a general summary of the historical development and current state of the techniques of pKa determination and an attempt to develop insight into future developments. Fourteen methods of determining the acid dissociation constant are placed in context and are critically evaluated to make a fair comparison and to determine their applications in modern chemistry.

Additionally, we have studied these techniques in light of present trends in science and technology and attempt to determine how these trends might affect future developments in the field. The centennial of the concept and of the quantitative measurement of pH was celebrated not long ago.

The related concept of the acid dissociation constant pK a as a substance property is recognized as being among the most commonly used parameters in modern-day chemistry.

Both pH and pK a are essential for understanding the behavior of chemical substances in everyday life. This realization came gradually and under different names.

The first notion of acids comes from ancient Greece, where people noticed that some substances tasted sour.

Measurements of osmotic pressures and conductivity of solutions gave insight into the degree of dissociation. Although Henderson defined K in terms of a concentration ratio init was not until that Hasselbalch 7 proposed their now famous equation 1which remains the most commonly used equation to calculate pK a values: the Henderson-Hasselbalch equation.

In many experimental methods to determine pK a values, a certain parameter is measured as a function of pH. This results in a characteristic sigmoid curve Fig. Generally speaking, for acidic components X ranges from a bulk property of a solution of only non-dissociated acid to the situation where only dissociated acid is present. A classic example of a sigmoidal curve created by plotting a measured quantity versus pH. The inflection point corresponds to pK a.

Amine value

Combining Equations 1 and 2 leads to for anions :. Since the Henderson-Hasselbalch equation only gives accurate results for dilute acids in aqueous solutions, another formula for the quantification of acid strength was developed by Hammett. However, difficulty associated with accurate determination of the parameters in this model has kept it from being as widely used as the Henderson-Hasselbalch equation.

This is commonly used to interpolate to other temperatures.The theoretical value of a right is the value of a subscription right. During the period of time when a new rights offering is announced up until three days before the subscription rights expire known as the cum rights periodthe value of the right is specific and can easily be calculated.

To calculate the value of a right during the window in which it is effective, and investor must be told the subscription price and the number of rights required to buy one share of stock. With that information the value of the right can be calculated using the following formula:. It is also known as the intrinsic value of the right. Because the value of stock shares that have rights attached to them during the cum rights period may differ from regular shares without such rights, investors want to know this theoretical value.

The theoretical value of the right is:. The period of time about three days before expiration is referred to as the exercise of rights period. These are the last days to exercise rights, but a period too soon to purchase new shares with rights, since the trade will settle before the record date, the day the rights expire.

theoretical amine value calculation

The theoretical value during the exercise of rights period — when rights trade independently of the stock — differs from the value during the cum rights period. The major difference is that rights have significantly less time value than most options because of their comparatively short lifespan.

How can I calculate number of OH group in a Polyol?

This value is calculated by determining the difference between the subscription price the investor paid and the theoretical ex-right price. Thus, the amount the investor would receive for the right is twice the value of the right during the cum rights period and even greater than the value of the right during the ex-rights period. Investing Essentials. Your Money. Personal Finance. Your Practice. Popular Courses. Key Takeaways The theoretical value of a right can be calculated during the cum rights period.

Investors with subscription rights are told the price for which they can purchase the shares--usually at a discount to current market price.

These same investors are told how many rights are necessary to purchase one share of stock. From this information the theoretical price can be calculated. The calculation for the value during the exercise of rights period is:. Compare Accounts. The offers that appear in this table are from partnerships from which Investopedia receives compensation.

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Related Terms Cum Rights Cum rights allow existing shareholders to buy new shares, typically at a price lower than the current market price of the shares in question. Ex-Rights Definition Ex-rights are stock shares that are trading but without rights attached because they've either expired, been transferred or been exercised.

It is a is a consideration for stock issued through a rights offering. American Options Allow Investors to Exercise Early to Capture Dividends An American option is an option contract that allows holders to exercise the option at any time prior to and including its expiration date. Partner Links. Related Articles. Stocks Understanding Rights Issues. European Options.Why don't fictional characters say "goodbye" when they hang up a phone?

What evidence does Coutu use to support her claim that improvisation requires resilience. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Hottest Questions. Previously Viewed. Unanswered Questions. Needs a Topic. Wiki User To calculate the value of an Anime, it's best to take into consideration the rarity of the piece. Next, compare prices of persons selling similiar items on online classified sites such as Craigslist.

Related Questions Asked in Chemistry What is the formula for tertiary amine? A tertiary amine is a type of amine, which is an organic compound derived from ammonia. The formula for a tertiary amine is R3N. Asked in Elements and Compounds Why methyl amine is a stronger base than ammonia?

Because Methyl amine has a bigger Kb value 4. You add one more amine into it! Asked in Elements and Compounds What is an amine oxide? An amine oxide is any of a class of organic compounds formed by the addition of an oxygen atom to an amine.

Djalil Amine was born in Amine Dahar was born in Amine Rzig was born in Asked in Science, Units of Measure What does It is 0. Asked in Chemistry What is the formula for the functional group in an amine? The functional group in an amine is NH2. Asked in Chemistry What is an amine ylide?

An amine ylide is another name for an ammonium ylide. Asked in Math and Arithmetic, Mathematical Finance What effect do interest rates have on the calculation of future and present value How does the length of time affect future and present value How do these two factors correlate?

What effect do interest rates have on the calculation of future and present value, how does the length of time affect future and present value, how do these two factors correlate. Asked in Microsoft Excel What is the difference between a label value and formula in excel? A label is just a heading to indicate what a value relates to. A value can be a number or a date or some other type of data. A formula is a calculation to do some activity and can involve a function.

Asked in Chemistry, Elements and Compounds What is oxidation state of di amine? Asked in Math and Arithmetic What is the mathematical value of obsidian in calculating capacity?

In the normal calculation of capacity meaning volumeobsidian has no value at all. Asked in Math and Arithmetic Can Km be a negative value? No the Km can never be a negative value. The Km increases or decreases with temperature.Definitions of the acid dissociation constant and pKa are given below the figures, together with the definition of some classes of organic acids.

In the table below, pK a1 and pK a2 is given together with boiling and melting point, density and molecular weight, as well as number of carbon, hydrogen and oxygen atoms in each molecule. For full table with molweight, melting and boiling temperature and density - rotate the screen!

An acid dissociation constant, K ais a quantitative measure of the strength of an acid in solution. It is the equilibrium constant for a chemical reaction known as dissociation of acid—base reactions.

In aqueous solution, the equilibrium of acid dissociation can be written symbolically as:. In all, but the most concentrated, aqueous solutions of an acid the concentration of water can be taken as constant and can be ignored.

The definition can then be written more simply. This is the definition in common usage. For many practical purposes it is more convenient to discuss the logarithmic constant, pK a. The larger the value of pK athe smaller the extent of dissociation at any given pH - that is, the weaker the acid. Polyprotic acids are acids that can lose more than one proton. Then we have more than one dissiciation constant; K a1K a2etc. All data given in the figures apply to dilute aqueous solutions at ambient temperature.

Hydrocarbon: An organic compound consisting entirely of hydrogen and carbon. Also called paraffin. Aromatic hydrocarbon : A cyclic ring-shapedplanar flat molecule with a ring of resonance bonds that exhibits more stability than other geometric or connective arrangements with the same set of atoms.

The simplest of the aromatics have 6 carbon atoms and contains 3 double bounds. A one ring aromatic without any substituents is called benzene, with the formula C6H6.

Phenyl: An phenyl group is a benzene substituent missing one hydrogen, with general formula C 6 H 5. Amine: A compound or functional group that contain a basic nitrogen atom with a lone pair. For 1-amines in this document the R represents an alkyl group, in which the NH2-group is placed at the end of the the alkane chain.

Pyrrole: A heterocyclic aromatic organic compound, a five-membered ring with two double bounds, with the formula C4H4NH. Substituted derivatives are called pyrroles. Dihydropyrrole: A compound formally derived from the aromate pyrrole by partial hydrogenation, containing one double bound. Also called pyrroline. Pyridine: A heterocyclic six-membered ring compound with the chemical formula C5H5N.

Piperidine: A heterocyclic amine consisting of a six-membered ring containing five methylene bridges —CH2— and one amine bridge —NH—.

The molecular formula is CH2 5NH. Quinoline: A heterocyclic aromatic organic compound, consisting of a benzene ring fused to a pyridine ring, with the molecular formula C9H7N and the nitrogen atom in position 1.

Isoquinoline: An analog to quinoline with the nitrogen atom in position 2. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro.

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