determination of intrinsic viscosity of polymers

The Brookfield method has a wider sphere of application, is not only applicable to polymers with medium and high molecular weights and salt-resistant polymers, which are widely applied currently, but also applicable to hydrophobic associated polymers, and is a novel method which can be widely popularized and applied in the whole industry. Compared with a capillary tube method (Uzziah method), a Brookfield method has the characteristics of relatively small measurement error and relatively high measurement precision and simultaneously, the method is simple and convenient to operate and is time-saving and labor-saving, and the work efficiency is improved greatly. The invention relates to an intrinsic viscosity number measuring method for polyacrylamide polymers for oil displacement, which comprises the following steps: measuring the apparent viscosity eta of a sample at 30 DEG C and at a constant rotation speed by using a Brookfield viscometer, calculating specific viscosity etasp by using a formula: etasp=(eta- eta0)/ eta0, drawing a scatter diagram between reduced viscosity (etasp/C) and mass concentration C, and linearly regressing the scatter diagram to obtain a straight line which is outwards pushed to a vertical coordinate, wherein an intercept on the vertical coordinate is an intrinsic viscosity number. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by China Petroleum and Natural Gas Co Ltd filed Critical China Petroleum and Natural Gas Co Ltd Priority to CN 201110170910 priority Critical patent/CN102353616B/en Publication of CN102353616A publication Critical patent/CN102353616A/en Application granted granted Critical Publication of CN102353616B publication Critical patent/CN102353616B/en Status Active legal-status Critical Current Anticipated expiration legal-status Critical Links

Original Assignee China Petroleum and Natural Gas Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor 杨怀军王伟纪朝凤马先平张�杰徐国安闫云贵孙向琴于娣崔丹丹程丽晶 Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number CN2011101709100A Other languages Chinese ( zh) Google Patents CN102353616A - Intrinsic viscosity number measuring method for polyacrylamide polymers for oil displacement CN102353616A - Intrinsic viscosity number measuring method for polyacrylamide polymers for oil displacement

Determination of intrinsic viscosity of polymers