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Determination method of limiting viscosity number of hydroxamic acid polyacrylamide

A polyacrylamide and intrinsic viscosity technology, which is applied in the field of intrinsic viscosity determination of hydroxamic acid polyacrylamide, can solve the problems of restricted molecular chain growth, low molecular weight of the product, narrow molecular weight distribution, etc., and achieves simple measurement steps, The effect of high measurement accuracy and reduced measurement cost

Inactive Publication Date: 2012-05-23
袁俊海
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Problems solved by technology

Because the organic solvent used in the precipitation polymerization process is a very active chain transfer agent for the polymerization of acrylamide, and most organic solvents are precipitation agents for polyacrylamide. When the molecular chain of the polymer grows to a certain length, it will It will precipitate and limit the further growth of the molecular chain, so the molecular weight of the obtained product is low and the molecular weight distribution is narrow

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  • Determination method of limiting viscosity number of hydroxamic acid polyacrylamide

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Embodiment

[0035] The intrinsic viscosity measuring method of a kind of hydroxamic acid type polyacrylamide that the present invention relates to comprises the following steps:

[0036] (a) prepare the sample solution;

[0037] (b) Wash the dilution type viscometer, dry it, install it, and adjust the temperature of the constant temperature water bath;

[0038] (c) First use a pipette to get 10ml of the sample solution and inject it into the viscometer, and keep the temperature constant;

[0039] (d) Measure the outflow time of the sample solution in the capillary repeatedly three times, so that the time difference between the three times is not more than 0.2s, take the average value, and record it as t 1 ;

[0040] (e) 5ml, 5ml, 10ml, 10ml of sodium chloride solution added to the capillary viscometer in turn, the solution is mixed evenly, and the solution outflow time t at each concentration is measured respectively 2 , t 3 , t 4 , t 5 , and make a record;

[0041] (f) Take out th...

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Abstract

The invention discloses a determination method of the limiting viscosity number of hydroxamic acid polyacrylamide, which comprises the following steps that: sample solution is prepared; the sample solution is injected into a viscometer; the time for the sample solution to flow out in the viscometer is tested; the flow-out time is tested after sodium chloride solution is added into the viscometer; and the limiting viscosity number is calculated through the determined data. The determination method of the limiting viscosity number of hydroxamic acid polyacrylamide can quickly determine the limiting viscosity number of the hydroxamic acid polyacrylamide, the determination precision is high, the determination steps are simple, the determination cost is reduced, and very good data support is provided for the use of hydroxamic acid polyacrylamide.

Description

technical field [0001] The invention relates to a method for measuring the intrinsic viscosity of hydroxamic acid type polyacrylamide. Background technique [0002] Facing the current situation of my country's environmental protection and the pressure brought by the international green fortress, it is very urgent to carry out the development and research of oilfield environmental protection technology in my country and solve the major environmental protection problems that plague my country's social and economic development. [0003] In the process of oil and gas exploration and development, oil and gas companies have adopted a large number of measures such as drilling and other oil and gas wells to put into production and increase production, resulting in a large amount of drilling sewage. During drilling, each well produces 400-500m of drilling sewage 3 , waste drilling fluid 500~700m 3 . At present, solving the pollution problem of sewage has become one of the important...

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Application Information

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IPC IPC(8): G01N11/06G01N1/28
Inventor 袁俊海
Owner 袁俊海