Polymer osmotic pressure measurement device and use method thereof

Abstract

The invention discloses a polymer osmotic pressure measurement device and a use method thereof. The device consists of a control unit and a measurement unit, wherein the control unit comprises a constant-temperature tank, a heating medium and an electrothermal wire which are arranged in an interlayer of the constant-temperature tank, a guide rail fixing plate fixed on the inner wall of the bottom of the constant-temperature tank, a pair of night glasses arranged on the side wall of the constant-temperature tank and a temperature sensor arranged on the inner side of the constant-temperature tank; the measurement unit comprises a liquid tank base, an osmosis film, a sealing ring, a liquid tank end cover and a pressure sensor; one side of the liquid tank base is matched on the guide rail in a sliding manner; a liquid tank, a liquid tank liquid feeding hole and a liquid tank liquid discharging hole are arranged on the liquid tank base; the pressure sensor is arranged in the liquid tank and is connected with a pressure and temperature acquirer through a lead wire. The polymer osmotic pressure measurement device integrates a static method and a dynamic method; a balance can be reached by the force in liquid at higher speed for only 1-2 hours, and the data acquisition time is short, so that the measured polymer molecular weight is closer to a real molecular weight.

Description

technical field [0001] The invention belongs to the technical field of osmotic pressure measuring devices, and in particular relates to a polymer osmotic pressure measuring device and an application method thereof. Background technique [0002] The molecular weight of polymer is one of the most basic parameters of polymer materials, which is closely related to the use performance and processing performance of polymer materials. The molecular weight of polymers involves the mechanical properties of polymer materials, the rheological properties of polymers, the processing properties of polymers and the selection of processing conditions. An important basis for structural research, many properties of the polymer change with the increase of the relative molecular weight. If the molecular weight is too low, the mechanical strength and toughness of the material are poor, which has no application value. If the molecular weight is too high, the melt viscosity increases, giving Diff...

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Problems solved by technology

The process of measuring osmolarity and osmotic pressure by dynamic method is cumbersome, and the influence of human factors is large, and the error of measurement results is large

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