CN103837438A - Method for determining intrinsic viscosity of twin-tailed hydrophobic association polymer - Google Patents
Method for determining intrinsic viscosity of twin-tailed hydrophobic association polymer Download PDFInfo
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- CN103837438A CN103837438A CN201210471527.3A CN201210471527A CN103837438A CN 103837438 A CN103837438 A CN 103837438A CN 201210471527 A CN201210471527 A CN 201210471527A CN 103837438 A CN103837438 A CN 103837438A
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Abstract
The invention discloses a method for determining the intrinsic viscosity of a twin-tailed hydrophobic association polymer. The method comprises the following steps: 1, preparing a twin-tailed hydrophobic association polymer sample for later use; 2, accurately weighing a purified polymer, and adding distilled water; 3, adding a certain amount of NaCl; 4, dissolving, and transferring the obtained solution to an experiment container; 5, diluting the solution to a scale to prepare a NaCl solution with a certain mass concentration of the twin-tailed hydrophobic association polymer; and 6, adopting a viscometer in a dilute solution range to determine the intrinsic viscosity of the polymer. The method can complete the determination of the intrinsic viscosity of the twin-tailed hydrophobic association polymer, and has the advantages of simple test process, short test time, and substantially reduced test cost.
Description
Technical field
The present invention relates to a kind of For Intrinsic Viscosity Measurements method of twin tail hydrophobic associated polymer.
Background technology
Hydrophobic associated water-soluble polymer, refers to the water-soluble polymers with a small amount of hydrophobic grouping on polymer hydrophilicity macromolecular chain.On water-soluble macromolecule chain, introducing a small amount of hydrophobic grouping makes its aqueous solution show unique rheological property.On certain polymer concentration, hydrophobic part associates and forms dynamic three-dimensional net structure, thereby forms very large supermolecule chain aggregation body, increases the hydrodynamic volume of polymkeric substance, improves significantly the viscosity of solution.The electrolytical polarity that can increase solvent that adds of little molecule, strengthens hydrophobic association effect, produces obvious salt-resistance.Under high shear forces, the dynamic physical cross-linked network structure that hydrophobic association forms is destroyed, solution viscosity declines, shear action reduction or the physical crosslinking of eliminating between rear macromolecular chain form again, viscosity will be recovered again, the irreversible machinery degraded of the polymkeric substance that general high molecular do not occur under high-rate of shear.Just because of its unique SOLUTION PROPERTIES, it may be applied in a lot of fields, as tertiary oil recovery, pharmacy, sun power conversion, cosmetics, coating, water treatment and drag reducer etc.Its correlative study in recent years receives much attention.
Hydrophobic close ester phenomenon is very general, below critical association concentration, mainly forms in molecule and associates, and consequently makes a ball of string shrink, and hydrodynamic volume reduces; More than CAC, main formation taking Interpolymer Association as main supramolecular structure has good tackifying.By Interpolymer Association, on the macro property of solution, show the feature that tackifying is strong, have certain temperature resistance, anti-salt and anti-shear ability.These special performances of hydrophobic associated polymer make it in many industrial technologies, all show huge application potential, and have great importance for the solution behavior that imitates the amphiphilic class material in life entity, thereby the exploration of hydrophobic associated water-soluble polymer is become to recent two decades carry out one of problem the most interesting in water-soluble polymers research field, and become the focus that industry and academia are studied.
Should trace back to the fifties initial stage to the research of amphiphilic base polymer, Strauss and assistant thereof have synthesized the solution behavior of a series of polysoaps in order to mimic protein for this reason, first Kauzmann has proposed the concept of " hydrophobic interaction ", and describes XC polymer as a series of phenomenons relevant to life science such as the formation of film in the constraint to enzyme of the conformation transition of protein, matrix, biosome with it.In the later stage in the sixties, Strauss group has synthesized again a series of hydrophobic super coil polymkeric substance that have.Contemporaneity, hydrophobically modified urea alkane (HEUR) comes out and is very fast for improving the rheological of water-based latex coating.Until today, researchist, still in effort, attempts that HEUR is made further improvements or find new material and replaces HEUR.
Last century the eighties, the SOLUTION PROPERTIES of hydrophobic associated polymer uniqueness and huge application potential thereof have attracted a large amount of researchists.Landoll is considered to study the real beginning of hydrophobic associated water-soluble polymer about the research of hydroxyethyl cellulose (HEC) hydrophobically modified.The people such as Emmons have delivered the patent with chain alkyl N-substituted acrylamide (CnAM) copolymerization cooperation water-based paint with acrylamide (AM).Before and after 1984, the researchist of Exxon research and engineering corporation starts to inquire into hydrophobic associated polymer the feasibility for oil-gas mining, and this is carried out to lasting and deep research, develop various hydrophobic monomer, and invent the novel polymeric method that solves hydrophilic monomer and the inconsistent problem of hydrophobic monomer in hydrophobic associated polymer polymerization process, it is micellar free radical copolymerization method, be called for short micellar copolymerization, the method is still the best approach in all polymerizations of hydrophobic associated polymer up to now.
At home, petroleum exploration and development research institute oiling the research that first started hydrophobic associated water-soluble polymer in 1995 of researchist, found that this base polymer has good temperature resistance, anti-salt and anti-shear ability, but while using, need to add stabilizing agent in salt solution.After this, the yellow high honour of Sichuan University has been carried out desk study with acrylic acid n-octyl as hydrophobic monomer, the cationic surfactivity hydrophobic monomer 2-methylacryoyloxyethyl-dimethyl dodecyl bromination amine (MEDMDA) synthesizing with oneself again has afterwards obtained hydrophobic associated water-soluble polymer with AM copolymerization, but the viscosity of the water-soluble polymers obtaining is very low, and critical association is dense.
Hydrophobic associated water-soluble polymer is by the atom difference that forms main chain, can be divided into carbochain and heteroatoms molecular backbone polymkeric substance, the former is mainly the multipolymer being obtained by the alkene monomer polymer of hydrophilic radical and hydrophobic grouping, what hydrophilic monomer was conventional mainly contains acrylamide and acrylic acid etc., and hydrophobic monomer mainly contains acrylamide derivative, long-chain acrylate etc.; The latter mainly passes through water-soluble high-molecular compound modification through macromolecular reaction, introduces hydrophobic functional group.Macromolecular reaction method advantage is directly to make initiation material with commercial polymer, and the product relative molecular mass obtaining is high, and its shortcoming is that reaction is carried out in full-bodied polymer solution, and reactant is not easy to mix.Hydroxyethyl cellulose (HEC) can be reacted with the hydrophobic compound with reactive group in this way, these hydrophobic compounds can be with the epoxy compound of chain alkyl, halogenated hydrocarbons, carboxylic acid halides, isocyanates etc., also can be at polyglycol (PEG) two termination hydrophobic groupings, but the amount of the general hydrophobic grouping of introducing is all little, because the high dissolubility that can significantly reduce water soluble polymer of content of hydrophobic monomers, and heteroatoms trunk polymer is compared with carbochain polymer, thermal stability is poor.Because when the carbon atom in macromolecular chain is replaced by heteroatomss such as oxygen, sulphur, nitrogen, the bond energy of C-O, C-S, C-N key is lower than C-C key, and polymer thermostable reduces.Therefore be, mainly the multipolymer being obtained by the vinyl monomer polymerization of hydrophilic radical and hydrophobic grouping for the hydrophobic associated water-soluble polymer of tertiary oil production in oil field at present.The conventional hydrophilic monomer of hydrophobic associated polymer that utilizes process for copolymerization to prepare is acrylamide (AM), because acrylamide is suitable for preparing the water-soluble polymers of high molecular, reasonable price.In addition, in order to increase the dissolubility of multipolymer, the anionic monomer that also can add other as acrylic acid (methacrylic acid), vinylsulfonate, 2-methyl-2-acrylamido propane sulfonic acid (AMPS) etc. with cationic monomer as β-dimethyl-aminoethylmethacrylate base trimethyl ammonium chloride, 2-acrylimide base-2-trimethoxysilyl propyl methacrylate ammonium chloride (AMPTAC), diallyldimethylammonium chloride etc.
Acrylamide hydrophobic associated copolymer is divided into three major types by the hydrophobic monomer of introducing: N-alkyl acrylamide hydrophobically modified multipolymer, acrylate hydrophobically modified multipolymer, Styrene and its derivatives hydrophobically modified multipolymer.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of For Intrinsic Viscosity Measurements method of twin tail hydrophobic associated polymer is provided, this assay method can complete the mensuration of the intrinsic viscosity to twin tail hydrophobic associated polymer, and test process is simple, test duration is short, greatly reduces testing cost.
Object of the present invention is achieved through the following technical solutions: a kind of For Intrinsic Viscosity Measurements method of twin tail hydrophobic associated polymer, comprises the following steps:
(a) first, prepare twin tail hydrophobic associated polymer sample for subsequent use;
(b) polymkeric substance that then, accurately takes purification adds distilled water;
(c) add again a certain amount of NaCl;
(d) after dissolving, be transferred in experiment container;
(e) be diluted to scale, be made into the NaCl solution of certain twin tail hydrophobic associated polymer mass concentration;
(f), within the scope of lean solution, adopt the intrinsic viscosity of viscometer determining polymkeric substance.
Described experiment container is 100mL volumetric flask.
In described step (e), twin tail hydrophobic associated polymer mass concentration is 1.00mol/L.
In described step (f), adopt the intrinsic viscosity that progressively dilutes extrapolation method mensuration polymkeric substance.
In sum, the invention has the beneficial effects as follows: can complete the mensuration of the intrinsic viscosity to twin tail hydrophobic associated polymer, and test process is simple, the test duration is short, greatly reduces testing cost.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The For Intrinsic Viscosity Measurements method of a kind of twin tail hydrophobic associated polymer the present invention relates to, comprises the following steps:
(a) first, prepare twin tail hydrophobic associated polymer sample for subsequent use;
(b) polymkeric substance that then, accurately takes purification adds distilled water;
(c) add again a certain amount of NaCl;
(d) after dissolving, be transferred in experiment container;
(e) be diluted to scale, be made into the NaCl solution of certain twin tail hydrophobic associated polymer mass concentration;
(f), within the scope of lean solution, adopt the intrinsic viscosity of viscometer determining polymkeric substance.
Described experiment container is 100mL volumetric flask.
In described step (e), twin tail hydrophobic associated polymer mass concentration is 1.00mol/L.
In described step (f), adopt the intrinsic viscosity that progressively dilutes extrapolation method mensuration polymkeric substance.
Said method can complete the mensuration of the intrinsic viscosity to twin tail hydrophobic associated polymer, and test process is simple, and the test duration is short, greatly reduces testing cost
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.
Claims (4)
1. the For Intrinsic Viscosity Measurements method of twin tail hydrophobic associated polymer, is characterized in that, comprises the following steps:
(a) first, prepare twin tail hydrophobic associated polymer sample for subsequent use;
(b) polymkeric substance that then, accurately takes purification adds distilled water;
(c) add again a certain amount of NaCl;
(d) after dissolving, be transferred in experiment container;
(e) be diluted to scale, be made into the NaCl solution of certain twin tail hydrophobic associated polymer mass concentration;
(f), within the scope of lean solution, adopt the intrinsic viscosity of viscometer determining polymkeric substance.
2. the For Intrinsic Viscosity Measurements method of twin tail hydrophobic associated polymer according to claim 1, is characterized in that, described experiment container is 100mL volumetric flask.
3. the For Intrinsic Viscosity Measurements method of twin tail hydrophobic associated polymer according to claim 1, is characterized in that, in described step (e), twin tail hydrophobic associated polymer mass concentration is 1.00mol/L.
4. the For Intrinsic Viscosity Measurements method of twin tail hydrophobic associated polymer according to claim 1, is characterized in that, in described step (f), adopts the intrinsic viscosity that progressively dilutes extrapolation method mensuration polymkeric substance.
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| CN201210471527.3A CN103837438A (en) | 2012-11-20 | 2012-11-20 | Method for determining intrinsic viscosity of twin-tailed hydrophobic association polymer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954147A (en) * | 2016-06-02 | 2016-09-21 | 西南石油大学 | Hydrophobic associated polymer intrinsic viscosity determining method |
| CN107402167A (en) * | 2017-06-27 | 2017-11-28 | 兰州蓝星纤维有限公司 | A kind of polyacrylonitrile-radical polymer fluid, the assay method of protofilament inherent viscosity |
-
2012
- 2012-11-20 CN CN201210471527.3A patent/CN103837438A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954147A (en) * | 2016-06-02 | 2016-09-21 | 西南石油大学 | Hydrophobic associated polymer intrinsic viscosity determining method |
| CN107402167A (en) * | 2017-06-27 | 2017-11-28 | 兰州蓝星纤维有限公司 | A kind of polyacrylonitrile-radical polymer fluid, the assay method of protofilament inherent viscosity |
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Application publication date: 20140604 |