XWJ—600B玻璃化溫度測(cè)定儀

XWJ—600B玻璃化溫度測(cè)定儀是由系統(tǒng)機(jī)控制，使試樣在爐體內(nèi)以一定的加熱（制冷）速率加熱（制冷）試樣，使試樣在恒定的較小的負(fù)荷下隨溫度升高（降低）發(fā)生形變，測(cè)量試樣溫度—形變曲線并通過分析該試樣的溫度—形變曲線，研究高分子材料力學(xué)性能的儀器。它能夠測(cè)定材料在等速升溫條件下的溫度、變形曲線，從而確定材料的玻璃化溫度Tg和流動(dòng)溫度Tf。它能測(cè)量各種材料的熱膨脹系數(shù)，從而確定這些材料的變化溫度點(diǎn)，燒結(jié)過程、收縮率、熱膨脹等特性。可廣泛應(yīng)用于高分子及其合成材料、藥物、陶瓷等材料的科研和生產(chǎn)中。

該儀器符合國家標(biāo)準(zhǔn)GB11998—XXXX

工作原理

聚合物試樣隨溫度上升，從玻璃態(tài)轉(zhuǎn)變?yōu)楦邚棏B(tài)，從高彈態(tài)轉(zhuǎn)變?yōu)榱鲃?dòng)態(tài)。試樣的高彈態(tài)和流動(dòng)態(tài)是可以通過形變過程而確定的。所以該機(jī)的工作原理就是通過鉑電阻Pt100感溫元件測(cè)量爐內(nèi)的溫度，由PLC進(jìn)行PID運(yùn)算，控制加熱部件或制冷單元，達(dá)到等速升溫的目的。形變由數(shù)顯百分表顯示并輸出位移信號(hào)上傳至PC機(jī)，PC機(jī)繪制溫度-變形曲線。zui后通過在溫度-變形曲線上找到拐點(diǎn)得到Tg和Tf值。

對(duì)應(yīng)于拉伸、針入等不同的實(shí)驗(yàn)形式，將高分子材料制成標(biāo)準(zhǔn)尺寸的試樣，放入對(duì)應(yīng)的試樣安裝架中，一同裝入控溫爐。通過電加熱器或液氮流、高精度控溫傳感器、計(jì)算機(jī)系統(tǒng)組成控溫系統(tǒng)，控制保溫爐的溫度及升、降溫速率，并實(shí)時(shí)監(jiān)測(cè)試樣的溫度。通過加載桿、砝碼對(duì)試樣施加恒定的試驗(yàn)力。通過數(shù)顯千分表實(shí)時(shí)測(cè)定試樣的形變量。具有一機(jī)多用，靈活方便的特點(diǎn)。

技術(shù)指標(biāo)

3.1 實(shí)驗(yàn)艙溫度

3.1.1 實(shí)驗(yàn)艙溫度范圍：-196℃～500℃

3.1.2 實(shí)驗(yàn)艙溫度控制范圍：-70℃～500℃（帶制冷）

3.1.3 溫度準(zhǔn)確度：±0.5℃

3.1.4 升溫速率：0.5℃/ min～5℃/ min

降溫速率：－0.5℃/ min～－2℃/ min。（帶制冷）

3.1.5 控溫元件：Pt100

3.1.6 爐腔測(cè)溫單元：熱電偶T

3.1.7 溫度分辨率：0.1℃

3.2 試樣變形位移測(cè)量

3.2.1位移有效測(cè)量范圍：5mm

3.2.2 位移測(cè)量分辨率：0.001mm  

3.2.3 位移測(cè)量準(zhǔn)確度：±0.005mm

3.2.4 數(shù)字千分表顯示，RS232串口數(shù)據(jù)輸出

3.3 載荷部分

3.3.1 加載桿質(zhì)量：260g

3.3.2 砝碼：300g、500g、1000g、1500g

3.4 時(shí)間顯示

內(nèi)部時(shí)鐘自動(dòng)計(jì)算，時(shí)間誤差：±1s/h

3.5 加熱部分

采用固態(tài)繼電器控制的電阻絲加熱

3.5.1 加熱電壓：AC220V，50Hz

3.5.1 加熱功率：800W

3.6 制冷部分

3.6.1 制冷劑：液態(tài)氮，理論溫度值：-196℃

3.6.2 制冷瓶容積：30L

3.6.3氣泵流量：37L/min

3.6.4 罐體壓力：0.16Mpa

3.6.5 工作壓力：0.03～0.08Mpa

3.6.6 控制開關(guān)：低溫電磁閥

3.7 試驗(yàn)方式

拉伸，彎曲，壓縮，針入，

3.7.1 拉伸試樣：

3.7.1.1 zui大夾持厚度：<3 mm

3.7.2 彎曲試樣：

3.7.2.1 彎曲壓頭半徑：R3.0±0.10 mm

3.7.2.2 彎曲支點(diǎn)半徑：R3.0±0.10 mm

3.7.2.3彎曲支座間距：15.0 mm

3.7.3 壓縮試驗(yàn)：

3.7.3.1 壓頭面積：12.56mm2

3.7.3.2 壓頭直徑：Φ4.0±0.05 mm

3.7.4 針入試驗(yàn)

3.7.4.1 針頭面積：1.00 mm2

3.7.4.2 針頭直徑：Φ1.13±0.05 mm

3.7.5 膨脹試驗(yàn)

3.8 總電源功率：1000W

3.9 電    源：220V±10%，50Hz

3.10 儀器外型尺寸：350mm×300 mm×600 mm

3.11 儀器重量：約 10kg

Xwj-600b glass temperature tester

XWJ - 600 b glass transition temperature meter is controlled by the system machine, make the samples in the furnace at a certain rate of heating (cooling) heating (cooling) sample, allow the sample under the load of constant small deformation temperature increase (decrease), measured sample temperature, deformation curve and by analyzing the deformation curve, the temperature of the sample - the high polymer material mechanics performance of the instrument.
It can determine the temperature and deformation curve of the material under the uniform temperature heating conditions, so as to determine the glass temperature Tg and the flow temperature Tf.
It can measure the thermal expansion coefficient of various materials, thus determining the temperature point, sintering process, shrinkage rate and thermal expansion of these materials.
It can be widely used in the research and production of polymer and its synthetic materials, drugs and ceramics.

The instrument conforms to the national standard gb11998-xxxx

Working principle

As the temperature rises, the polymer samples are converted from the glass to high-elastic states and from the high elastic state to the flow dynamics.
The high elastic and flow dynamics of samples can be determined by the deformation process.
Therefore, the working principle of this machine is to measure the temperature in the furnace through the Pt100 of the platinum resistance Pt100, and the PID operation of the PLC is carried out to control the heating parts or the cooling unit, which can achieve the purpose of equivelocity heating.
The deformation is displayed by the digital display and the output displacement signal is uploaded to the PC, and the PC draws temperature - deformation curve.
The Tg and Tf values were obtained by finding an inflection point on the temperature-deformation curve.

Corresponding to the different forms of experiment, such as stretching and needle entry, the polymer material is made into a standard size sample and put into the corresponding sample mounting rack to load the temperature control furnace together.
The temperature and temperature rise and cooling rate of the insulation furnace are controlled by electric heater or liquid nitrogen flow, high precision temperature control sensor and computer system, and the temperature of the sample is monitored in real time.
The constant test force is applied to the sample by loading the rod and weight.
The shape variables of the sample are measured in real time by means of digital display micrometer.
It has a multi-purpose, flexible and convenient feature.

Technical indicators

3.1 experimental cabin temperature

3.1.1 lab temperature range: - 196 ℃ ~ 500 ℃

3.1.2 lab temperature control range: - 70 ℃ ~ 500 ℃ (refrigeration)

3.1.3 temperature accuracy: plus or minus 0.5 ℃

3.1.4 heating rate: 0.5 ℃ / min ~ 5 ℃ / min

Cooling rate: 0.5 ℃ / min ~ - 2 ℃ / min.
(with refrigeration)

3.1.5 temperature control element: Pt100

3.1.6 chamber temperature measurement unit: thermocouple T

3.1.7 temperature resolution: 0.1 ℃

3.2 deformation displacement measurement of samples

3.2.1 displacement effective measurement range: 5mm

3.2.2 displacement measurement resolution: 0.001mm

3.2.3 displacement measurement accuracy: plus or minus 0.005mm

3.2.4 digital micrometer display, RS232 serial port data output

3.3 load part

3.3.1 loading bar quality: 260g

3.3.2 weight: 300g, 500g, 1000g, 1500g

3.4 time display

Internal clock is automatically calculated, time error: plus or minus 1s/h

3.5 heating part

The resistance wire controlled by a solid state relay is heated

3.5.1 heating voltage: AC220V, 50Hz

3.5.1 heating power: 800W

3.6 refrigeration part

3.6.1 refrigerants, liquid nitrogen, theoretical temperature: - 196 ℃

3.6.2 refrigerator volume: 30L

3.6.3 air pump flow: 37L/min

3.6.4 tank pressure: 0.16Mpa

Work pressure: 0.03 ~ 0.08Mpa

3.6.6 control switch: low temperature solenoid valve

3.7 test mode

Stretch, bend, compress, needle in,

3.7.1 tensile test sample:

3.7.1.1 maximum clamping thickness: <3 mm

3.7.2 bending specimen:

3.7.2.1 bending head radius: R3.0 or minus 0.10 mm

3.7.2.2 bending point radius: R3.0 plus or minus 0.10 mm

3.7.2.3 bending support spacing: 15.0mm

3.7.3 compression test:

3.7.3.1 head area: 12.56mm2

3.7.3.2 pressure head diameter: Φ 4.0 + / - 0.05 mm

3.7.4 needle test

3.7.4.1 needle area: 1.00 mm2

3.7.4.2 needle diameter: Φ 1.13 + / - 0.05 mm

3.7.5 expansion test

3.8 total power supply: 1000W

3.9 source: 220V plus or minus 10%, 50Hz

3.10 external dimensions: 350mm x 300 mm x 600 mm

3.11 instrument weight: about 10kg