排序方式: 共有67条查询结果,搜索用时 15 毫秒
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采用热重分析对作为耐高温材料使用的聚砜酰胺基单聚合物复合材料(PSA SPCs)进行热性能研究。通过计算积分程序分解温度(IPDT)和温度指数Ts分别评价材料的热稳定性和长期使用温度,通过计算温度指数Tzg来表征耐热性能。PSA SPCs的IPDT、Ts以及Tzg分别为1305℃,248℃和255℃,而PSA树脂材料相对应的参数值依次是1162℃,243℃和244℃,表明PSA SPCs的热性能优于PSA树脂材料。采用不同升温速率,分别用Flynn-Wall-Ozawa法和Kissenger法研究其热降解动力学,计算得到反应活化能(Ea)分别为152.26 k J/mol,146.85 k J/mol,优于PSA树脂材料的Ea值(133.54 k J/mol,127.88 k J/mol)。 相似文献
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Three-dimensional porous paper was prepared by using polysulfonamide (PSA) fiber and pulp as the raw materials. The effect of PSA fiber to pulp ratios on the mechanical strength and adsorption properties (using methyl orange and rhodamine B dyes in their aqueous phase) of the paper were studied. The results showed that the tensile strength and elongation characteristics decreased as the PSA fiber to pulp ratio increased, while the tear strength increased. PSA paper showed good adsorption performance for both methyl orange and rhodamine B, with the adsorption process conforming to the pseudo-second-order and Langmuir isotherm models, indicating monolayer chemical adsorption. The study has provided an improved theoretical and scientific basis for the further development and application of PSA paper. 相似文献
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芳砜纶应用于消防防护服的性能研究 总被引:5,自引:3,他引:2
验证了芳砜纶的热稳定性及隔热性能,实验表明芳砜纶纤维经300℃以下高温长时间处理,仍能保持原纤维3/4的拉伸断裂强度;芳砜纶有不亚于Nomex的隔热性能,以此推测芳砜纶在消防防护服中有很好的应用前景. 相似文献
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Polysulfonamide (PSA)-based membranes are widely used for high-temperature filtration. PSA/polyurethane (TPU) composite membranes that can withstand a temperature exceeding 200 °C are fabricated by an electrospinning method. The effects of PSA/TPU mass ratio on the morphology and properties of the prepared composite membranes are investigated to obtain nanofibers with different diameters. These composite membranes are characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and differential scanning calorimetry, and mechanical and filtration properties of membranes are also investigated. The maximum stress and elongation at break of PSA/TPU nanofibers’ membranes reach 13.66 ±1.43 MPa and 75.01 ± 3.78%, respectively, when the PSA/TPU mass ratio is 3:7. Moreover, filtration results show high filtration efficiency (>99%) and low pressure drop for diethyl-hexyl-sebacat (DEHS) and sodium chloride (NaCl) aerosol particles at 4 m3 h−1 airflow velocity. Therefore, PSA/TPU composite membranes are a promising candidate for high-temperature filtration applications. 相似文献
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