描述

Pps树脂耐热性

所有先进工程塑料中最广泛的耐化学品性

改进了Pps的尺寸稳定性和热性能

将强度保持在425ºF以上

对蒸汽、强碱、燃料不敏感，酸

最小吸水率

优良的电绝缘体

极低的线性热膨胀系数

Pps树脂耐热性

产品细节

，以及在高温下自身重量的稳定性。因此，可以通过测量聚合物在高温下的机械性能和重量损失来确定耐热性。PPS在所有热塑性工程塑料中表现出优异的耐热性。聚苯硫醚的熔点高达280-290℃。它在430-460℃以上的空气中开始分解，其热稳定性远远超过PA、PBT、POM和PTFE。与其他工程塑料相比，经玻璃纤维增强后，聚苯硫醚的热变形温度可达260℃，热塑性塑料的长期使用温度可达220-240℃。在200℃时，其抗弯强度仍高于室温ABS，是一种优良的高温结构材料。PPS的焊接耐热性也比其他工程塑料高得多，因此适合制造电子和电气零件。即使在热固性塑料中，这种热性能也很少见。此外，聚苯硫醚本身具有良好的隔热性能，但通过添加适当的填料，也可以制备具有良好导热性能的聚苯硫醚复合材料。PPS的热失重分析表明，在低于500°C的空气和氮气中加热时没有明显的失重，只有在700°C的空气中才会完全降解。在惰性气体中，即使在1000℃的高温下，PPS仍能保持其原始重量的40%。聚苯硫醚优异的热稳定性还体现在高温环境下的强度保持率和高温热老化后的强度保持率上。据报道，聚苯硫醚玻璃纤维层压板制成的绝缘垫在200℃和24.5MPa压力下连续使用22000小时，只有垫的表面和浅层经历了深度氧交联，距离表面1mm。在深层，聚苯硫醚仍然具有典型的热塑性特征，这是热固性聚苯硫醚表层形成的结果，用于屏蔽和保护

了解PP

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Pps Resin Heat Resistance

Broadest resistance to chemicals of all advanced engineering plastics
Improved dimensional stability and thermal performance over PPS
Maintains strength above 425º F
Inert to steam, strong bases, fuels, and acids
Minimal water absorption
Excellent electrical insulator
Very low coefficient of linear thermal expansion

Pps Resin Heat Resistance

Product Details

pps resin heat resistance

The heat resistance of a polymer is embodied in its molecular size, mechanical properties, and stability of its own weight at high temperatures. Therefore, the heat resistance can be determined by measuring the mechanical properties and weight loss of the polymer at high temperatures. PPS shows excellent heat resistance among all thermoplastic engineering plastics. The melting point of PPS is as high as 280-290℃. It starts to decompose in the air above 430-460℃, and its thermal stability far exceeds that of PA, PBT, POM and PTFE. And other engineering plastics, after being reinforced with glass fiber, the heat distortion temperature of PPS can reach 260℃, and the long-term use temperature can reach 220-240℃ in thermoplastics. The bending strength is still higher than room temperature ABS at 200℃, so it It is an excellent high-temperature structural material. The solder heat resistance of PPS is also much higher than other engineering plastics, making it suitable for making electronic and electrical parts. Such thermal properties are rare even in thermoset plastics. In addition, PPS itself has good thermal insulation, but by adding appropriate fillers, PPS composites with good thermal conductivity can also be prepared. The thermal weight loss analysis of PPS shows that there is no obvious weight loss when heated in air and nitrogen below 500°C, and it will be completely degraded only in the air at 700°C. In inert gas, even at a high temperature of 1000 ℃, it can still maintain 40% of its original weight. The excellent thermal stability of PPS is also reflected in the strength retention rate under high temperature environment and the strength retention rate after high temperature thermal aging. According to reports, the insulation pad made of PPS glass fiber laminate is used continuously for 22000h at 200℃ and 24.5MPa pressure, only the surface and shallow layers of the pad have undergone deep oxygen cross-linking, which is 1mm away from the surface. In the deep layer, PPS still has typical thermoplastic characteristics, which is the result of the formation of the surface layer of thermosetting PPS for shielding and protection.

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