SU873084A1

SU873084A1 - Device for determination of temperature transition in materials

Info

Publication number: SU873084A1
Application number: SU802884970A
Authority: SU
Inventors: Юрий Федорович Шутилин
Original assignee: Воронежский технологический институт
Priority date: 1980-02-18
Filing date: 1980-02-18
Publication date: 1981-10-15

Description

1. Изобретение относитс к области физических измерений, преимущественно к проблеме оценки структуры и свойств материалов при разных температурах .1. The invention relates to the field of physical measurements, mainly to the problem of assessing the structure and properties of materials at different temperatures.

Известны линейные дилатометры, основывающиес на измерении размеров образцов при изменении температуры 1.Linear dilatometers are known, based on measuring the size of samples with a change in temperature of 1.

Однако их конструкции не предусматривают проведени динамических механических измерений.However, their designs do not involve dynamic mechanical measurements.

Наиболее близким к предложенному вл етс крутильный ма тник, имеющий систему противовеса, соединенную , через нить подвеса с инерционной деталью, систему регистрации колебаний , зажимы дл креплени образца в термокриокамере 2.The closest to the proposed one is a torsion head having a counterweight system connected, through a suspension thread with an inertial part, a system for registering vibrations, clamps for fastening a sample in a thermal cryochamber 2.

Однако этот ма тник не позвол ет проводить дилатометрические измерени одновременно с замерами механических потерь и модул сдвига, что затрудн ет сопоставление результатов.However, this archive does not allow dilatometric measurements simultaneously with measurements of mechanical losses and shear modulus, which makes it difficult to compare the results.

Целью изобретени вл етс получение возможности проведени на приборе одновременно динамических механических и дилатометрических измерений и экономи средств.The aim of the invention is to obtain the possibility of simultaneously performing dynamic mechanical and dilatometric measurements on the device and saving money.

Поставленна цель достигаетс ,тем, что к подвижным част м системы противовеса дополнительно присоедин етс система регистрации линейного расширени образца, котора может выполн тьс в виде неравноплечего рычага и измерительной шкалы, или в виде зеркала, на которое падает луч.света, отражающийс на измерительную шкалу, The goal is achieved in that the moving parts of the counterweight system are additionally connected to a system for registering linear expansion of the sample, which can be performed as an unequal arm and measuring scale, or as a mirror on which the light falls on the measuring scale. ,

10 или в виде электрического конденсатора , одна пластина которого укреплена неподвижно, а втора соединена с подвижными част ми системы противовеса , или в виде стержн из магнит15 ного материала, движущегос относительно электрической катушки, или в виде светонепроницаемого материала, укрепленного на подвижных част х системы противовеса и закрывающего 10 or in the form of an electric condenser, one plate of which is fixedly fixed and the second is connected to the moving parts of the counterweight system, or in the form of a rod of magnetic material moving relative to the electric coil, or in the form of an opaque material mounted on the moving parts of the counterweight system and closing

20 доступ света к рабочей зоне фотоэлемента .20 access of light to the working area of the photocell.

На чертеже изображено предложенное устройство.The drawing shows the proposed device.

Образец 1. с помощью зажима 2 Sample 1. using clip 2

Claims

25 is fixed in the thermal chamber 3 and connected with the inertial part 5 by means of the rod 4, which is connected to the counterweight 6 by the thread of the suspension 7 via the counterweight lever 8. The index arrow 9 is suspended from the lower arm of the weight 6 and has a long end at the scale 10. The weight of the counterweight of the tandem holder B and the counterbalance of the arrow I was selected in such a way that a sample of load 1 acted slightly. When operating in a torsion mode, the inertia part 5 deviates (twists) from the equilibrium position, which via the rod 4 and the upper RIH mobile clamp 2 is transferred to sample 1. Then the inertia part 5 is released, and the system performs damped torsional vibrations, whose parameters are fixed by the system registration of oscillations (not shown). In this way, mechanical losses and shear moduli are measured at various temperatures. When operating in the dilatometer mode, before conducting the experiment, a zero of the scale 10 is set at the end of the arrow 9. During cooling or heating, sample 1 due to expansion changes its length, which is transmitted through the rod 4, thread 7, counterweight 6 to arrow 9 and is fixed on the scale 10 If necessary, the accuracy of measurements of sample extensions can be increased by replacing the registration system of extensions with a more sensitive, for example, mirror photoelectric, etc. It is possible and more expedient to operate the device simultaneously as a dilatometer. And as a torsional pendulum. In this case, the degree of linear expansion and the mechanical characteristics of the material are determined simultaneously. The proposed device makes it possible to determine on one device, on one sample, under the same heating or cooling conditions, for example, for polymers, the temperature of structural and mechanical glass transition. This is very important and valuable for obtaining accurate, reliable information on the processes of glass transition, crystallization, melting, and other temperature transitions in various materials. Changing the design of the tiger was also economical. Claim 1. A device for determining temperature transitions in materials, comprising a reverse torsion holder having an oscillation detection system, a counterweight system connected through a suspension thread to an inertia part, clamps for fastening a sample in a thermal cryochamber, characterized in that simultaneous dynamic mechanical and dilatometric measurements and cost savings, the registration system is additionally connected to the moving parts of the counterweight system Sample expansion. 2. Device POP.1, DIFFERENT THAT the system of registration of linear expansion of the sample is made in the form of unequal arm (Schach and measuring scale. 3. Device POP.1, characterized in that the system of registration of linear expansion of the sample is executed in the form of a mirror on which falls 4. Reflector POP.1, characterized in that the registration system for linear expansion of the sample is made in the form of an opaque material that blocks access of light to the working area of the photocell. 5. The device Item 1, characterized in that the system for detecting linear expansion of a sample is made in the form of plates of an electrical capacitor. Is. The device according to Clause 1, about T and that the system for registering linear expansion of a sample is made in the form of a rod of magnetic material moving relative to an electric coil. Sources of information (forma- tions taken into account during the examination 1. Yu. K. Thermophysical methods for studying polymers. M., Himi, 1967, p.27.

2. Perepechko I.I. Acoustic Polymer Research Methods. M., Himi, 1973, p. 54 (prototype).

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