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Information Name: | Liaoning pam polyacrylamide |
Published: | 2013-07-04 |
Validity: | 30 |
Specifications: | |
Quantity: | 1.00 |
Price Description: | |
Detailed Product Description: | Q: polyacrylamide flocculant failure determination method A: Southern regions due to humid climate, some wastewater treatment plant polyacrylamide stacking for a long time due to either tie the package did not lead to absorb moisture caking mouth, had this doubt, product is not a failure, and still able to reuse? In view of this situation, as long as the product dissolved open solution with viscosity, there is no failure, but after polyacrylamide agglomeration is difficult to dissolve open, in fact, also means a waste of resources. Different types of polyacrylamide shelf life is very different, and its structure is associated with this, relatively speaking, anionic polyacrylamide take longer valid point, cationic polyacrylamide general we state regulations shelf life of 1 year. Beyond this period are considered over shelf life. There is the risk of failure, failure polyacrylamide judged from two aspects, one is the viscosity, flocculation second variation. Q: polyacrylamide viscosity factors? A: 1, the temperature on the viscosity of polyacrylamide. Temperature is the molecular thermal motion intensity of random reflection of molecular movement must overcome the interaction between molecules, and molecular interactions, such as hydrogen bonds, internal friction, diffusion, molecular chain orientation, entanglement, etc. size directly affects the viscosity, the polymer solution viscosity with temperature change. Change in temperature of the polymer solution viscosity is significant. Polyacrylamide solution viscosity decreases with increasing temperature, which causes the polymer solution to form a dispersed phase particles are entangled polymer network structure, the higher the temperature, the network structure more easily damaged, so its viscosity decreases . 2, the hydrolysis time of the viscosity of polyacrylamide. Hydrolyzed polyacrylamide solution viscosity with change in the extension of time, the hydrolysis time is short, low viscosity, which may be due to the formation of polymer network structure had time period; hydrolysis time is too long, the viscosity decreased, this is polyacrylamide release structure in solution due. HPAM dissolved in water dissociates into negatively charged macromolecules, the electrostatic repulsion between molecules, and the same type of molecule chain anionic repulsion between molecules in solution leading to stretch and intertwining between molecules can , which is partially hydrolyzed polyacrylamide enable it to cause significant increase in solution viscosity. 3, the degree of mineralization polyacrylamide viscosity. Polyacrylamide molecular chain cationic group with a larger number of the anionic groups, the net charge of more polar, and H20 is a polar molecule dissolves according to the similarity, preferably a water-soluble polymer, intrinsic viscosity large; With mineral content increases, the positive electrostatic charge portion is surrounded by the anion form ionic atmosphere, and thus with the surrounding with a positive electrostatic charge, the polarity of the polymer solution decreases, the viscosity decreases; mineral density continues to increase, cation and anion radicals form intramolecular or intermolecular hydrogen bond association of (cause polymer solubility in water drop), while adding salt ions by shielding positive and negative charges, dismantled positive and negative ions leaving the association between the formed salt bond damage (resulting increase in solubility of the polymer in water), these two competing effects, the polymer solution is at a higher salt concentration (> 0.06 mol / L) the viscosity remains low. 4, molecular weight polyacrylamide viscosity. Polyacrylamide polymer solution viscosity with the increase of the molecular weight, which is due to the viscosity of the polymer solution from the molecular movement intermolecular interaction. When the relative molecular mass of about 106, the polymer coils begin mutual penetration, enough to affect the light scattering. Higher levels of mechanical entanglement enough to affect viscosity. Content is very low, the polymer solution can be regarded as the network structure, mechanical entanglement and hydrogen bonding between chains together form a network node. Content is high, the solution contains a number of chain - linked contacts, the polymer solution was gelled. Therefore, the larger the molecular weight polymer, the more easy to form intermolecular chain entanglement, the greater the viscosity of the solution. Unit Name: Beijing Open Source Bi Environmental Engineering Co., Ltd. Company Address: Chaoyang District, Zhuang Zi skin Dongba House Village Industrial Zone Zip Code: 100018 Contact: Manager Li Mobile: 15001362482 Tel 010 -57127953 Fax Number: 02 - 82845391 Website: http://www.kbyyaoji.com E-mail: lihongmin2013@163.com |
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You are the 8431 visitor
Copyright © GuangDong ICP No. 10089450, Beijing Open Source Bi Environmental Engineering Co., Ltd. All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility