SU272640A1 - METHOD FOR DETERMINING THE DEGREE OF POLYMER MATERIALS SMELLING - Google Patents
METHOD FOR DETERMINING THE DEGREE OF POLYMER MATERIALS SMELLINGInfo
- Publication number
- SU272640A1 SU272640A1 SU1216156A SU1216156A SU272640A1 SU 272640 A1 SU272640 A1 SU 272640A1 SU 1216156 A SU1216156 A SU 1216156A SU 1216156 A SU1216156 A SU 1216156A SU 272640 A1 SU272640 A1 SU 272640A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- determining
- degree
- solvent
- smelling
- polymer materials
- Prior art date
Links
- 239000002861 polymer material Substances 0.000 title description 2
- 239000002904 solvent Substances 0.000 description 12
- 230000002522 swelling Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000009114 investigational therapy Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Description
Изобретение относитс к способу определени степени набухани различных полимерных материалов в растворител х.The invention relates to a method for determining the degree of swelling of various polymeric materials in solvents.
Известен способ определени степени набухани полимерных материалов погружением исследуемого образца в растворитель и измерением емкости набухшего образца.A method is known for determining the degree of swelling of polymeric materials by immersing the sample under investigation in a solvent and measuring the capacity of the swollen sample.
Цель изобретени - повысить точность и чувствительность определени .The purpose of the invention is to improve the accuracy and sensitivity of the determination.
Сущность предлагаемого способа состоит в том, что берут образец, нанесенный на поверхность термосопротивлени , включенного в мостовую схему, удал ют растворитель, измер ют изменение силы тока в процессе удалени растворител и по количеству энергии, затрачеииой па его удаление, определ ют степень набухани .The essence of the proposed method consists in taking a sample deposited on the surface of the thermal resistance included in the bridge circuit, removing the solvent, measuring the change in current during the solvent removal process and determining the amount of energy spent on removing it, determining the degree of swelling.
Способ осуществл ют следующим образом.The method is carried out as follows.
Измерительный мост, в два плеча которого включены термосопротивлени (одно покрыто слоем полимерного материала), помещают в нары (жидкость) растворител и выдерживают некоторое врем , после чего через термосопротивление пропускают электрический ток. В случае использовани жидкого растворител перед нагреванием термосопротивлени последнее удал ют из жидкости и удаление растворител производ т в газообразпой среде.A measuring bridge, in the two arms of which thermal resistances are included (one is covered with a layer of polymeric material), is placed in the bunks (liquid) of the solvent and held for some time, after which an electric current is passed through the thermal resistance. In the case of using a liquid solvent, before heating the thermal resistance, the latter is removed from the liquid and the solvent is removed in a gaseous medium.
ратуры, при которой происходит интенсивное удаление растворител .baths where intensive removal of the solvent occurs.
Полимерный материал нагревают до заранее заданной температуры и измер ют врем установлени теплового состо ни , которое характеризует количество поглощенных паров (жидкости) растворител . Способ основан на использовании динамических процессов.The polymer material is heated to a predetermined temperature and the time taken to establish the thermal state, which characterizes the amount of absorbed solvent vapor (liquid), is measured. The method is based on the use of dynamic processes.
Преимуществом используемой схемы вл етс мала энергоемкость вследствие затраты энергии только в момент измерени .The advantage of the scheme used is low power consumption due to the cost of energy only at the time of measurement.
Исследование кинетики набухани производитс по времени термоудара - времени достижени заданной температуры чувствительного элемента мостовой схемы, а выходной величиной вл етс врем - импульсный сигнал , удобный дл цифрового преобразовани и передачи на рассто ние. Способ характеризуетс отсутствием гистерезисных влений при повторных измерени х.The swelling kinetics is studied by thermal shock time — the time to reach the specified temperature of the sensitive element of the bridge circuit, and the output value is time — a pulse signal convenient for digital conversion and transmission to distance. The method is characterized by the absence of hysteresis effects during repeated measurements.
Предмет изобретени Subject invention
Способ определени степени набухани полимерных материалов путем помещени исследуенЕого образца в растворитель, отличающийс тем, что, с целью повышени точности и чувствительности определени , берут образец, 34The method of determining the degree of swelling of polymeric materials by placing the sample under investigation in a solvent, characterized in that, in order to increase the accuracy and sensitivity of the determination, a sample is taken, 34
нанесенный на поверхность термосопротивле- в нроцессе удалени растворнтел и по колини , включенного в мостовую схему, удал ют честву энергии, затраченной на его удаление, растворитель, измер ют изменение силы тока определ ют степень набухани .deposited on the surface of thermo-resistance in the process of removing the solvent and on the collar included in the bridge circuit, the amount of energy spent on its removal is removed, the solvent, the change in current intensity is determined by the degree of swelling.
272640 272640
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU823453023A Addition SU1270127A2 (en) | 1982-06-14 | 1982-06-14 | Bath glassmaking furnace |
Publications (1)
Publication Number | Publication Date |
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SU272640A1 true SU272640A1 (en) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4408482A (en) * | 1981-12-18 | 1983-10-11 | Tsentralny Nauchno-Issledovatelsky Institut Kozhevenno-Obuvnoi Promyshlennosti | Method and apparatus for the determination of moisture content of fibrous and granular materials |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4408482A (en) * | 1981-12-18 | 1983-10-11 | Tsentralny Nauchno-Issledovatelsky Institut Kozhevenno-Obuvnoi Promyshlennosti | Method and apparatus for the determination of moisture content of fibrous and granular materials |
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