仪器介绍：
英国Ray-Ran生产的环境应力开裂仪RR/ESC符合ASTM D1693 标准，操作简单，测定当高分子材料暴露在如肥皂泡、试剂、油和清洁剂等不同的环境中时的应力开裂指数。将预应力样品放在固定在所测环境中的管中，再放在控温浴中，大多数高分子材料一般设置在50℃。观察样品在规定时间间隔内，由小裂缝发展到开裂。
标准配置：
0-400 °C数字温度测量、控制及显示
连续控温的不锈钢液浴
切断样品的打孔机和模
采集裂痕的夹具，使样品中形成可控的破裂
把样品弯成”U”型的弯曲夹钳
在试管中固定样品的夹具
将样品从夹钳移到夹具的工具
一个样品夹具可容纳多达10个样品
48个玻璃试管和橡胶塞
Product Description
Environmental Stress Cracking. is one of the most common causes of unexpected brittle failure of thermoplastics polymers known. Research has shown that the exposure of polymers to liquid chemicals accelerate the crazing process.
The Ray-Ran Stress Cracking Apparatus has been designed in accordance with the ASTM D1693 test method, it is simple to use and an extremely cost effective method of determining a polymer material’s susceptibility to stress cracking when exposed to different environments such as soaps, wetting agents, oils and detergents.
The material is cut to shape with the die cutter provided and notched and then the test sample bent into a “U” section to induce the required stress. The samples are placed into the sample holders which are then transferred to the glass test tubes. These tubes are filled with the selected environment and heated. At timed intervals the samples are checked for any cracks developing adjacent to the notch. The number of failures is recorded.
Standard features include
Digital temperature display and control, Constant temperature controlled stainless steel liquid bath, Sample Cutter to cut out test samples, Sample nicking jig to make the controlled imperfection in the test samples, Sample bending clamp to bend the test samples into a controlled “U” shape, Specimen holders to house the test samples in the test tubes (up to 10 test samples can be housed in each specimen holder), Sample transfer tool to move the test sample from the clamp to the specimen holders, 48 glass test tubes and rubber stoppers, Product user manual, CE mark of conformity, 1 year return to base warranty,
Test Description
The test sample is notched and then bent into a “U” section to induce the required stress. The samples are placed in the glass tubes, filled with the selected environment and heated. At regular intervals the sample are checked for any cracks developing adjacent to the notch.
Part Numbers
RR/ESC – Environmental Stress Cracking Apparatus, — ESC 029 – Spare Pack of 10 Nicking Blades
Complies with Standard(s)
ASTM D1693