《聚苯硫醚（PPS）树脂》由会员分享，可在线阅读，更多相关《聚苯硫醚（PPS）树脂（38页珍藏版）》请在金锄头文库上搜索。
1、耐高温高性能 工程塑料耐高温高性能 工程塑料的基本性能的基本性能聚 苯 硫 醚聚 苯 硫 醚iDIC.PPS的基本性能的基本性能机械性能、热性能、电性能、成型加工性及其他 PROPERTIES OF DIC.PPSMechanical, Thermal, Electrical, Processing these are especially excellent rigidity and lower creep deformation under elevated temperature. The other is the linear molecular construction polyme
2、r based; these have excellent toughness and lower water absorption than former, because of its high purity polymer.This combination of superior properties and process ability provide the designer and processor with a unique material in applications which require;Heat Resistance,Superior Strength and
3、 Modulus,Inherent Flame Resistance,Excellent Dimensional Stability,Chemical Resistance,Excellent Electrical Properties andMolding of Intricate and Precision Parts.Fig.1.1 Fig.1.1 PPS是由苯环和硫构成的具有简单化学结构的树脂PPS是由苯环和硫构成的具有简单化学结构的树脂 PPS is a simple chemical construction consisting of benzene ring and sulfu
4、r atom1、引 1、引 言言聚苯硫醚（PPS）树脂是具有如图Fig.1.1中所示的化学结构的结晶性耐热高分子材料。该树脂除具有约280的熔点，优异的耐化学药品性外，还有无需添加阻燃剂就具有自熄的阻燃特性。用玻璃纤维等纤维增强材料和无机矿物填充、增 强的DIC.PPS复合材料是具有优异的耐热性、高机 械强度，同时具有优异的尺寸稳定性的典型的工程 塑料材料。DIC.PPS大致分为两大类。一类是以交联聚合物为 基体的复合材料，它是具有在高温下仍保持高刚 性、低蠕变性的一类。另一类是以线性聚合物为基 体的复合材料，它具有良好的韧性。高纯度的线型 聚合物具有在高温高湿下比交联聚合物的吸湿性更 低的特
5、性。 由于DIC.PPS具有以上的特性，是可以应对以下 所示的应用领域使用要求的成型材料，是设计者 和成型加工者很容易上手的高品质工程塑料材料。200以上连续使用的耐热性200以上连续使用的耐热性 很宽的温度范围内的高刚性和强度很宽的温度范围内的高刚性和强度 树脂本身就具有UL V-0级的阻燃性 树脂本身就具有UL V-0级的阻燃性 广泛的环境条件下优异的尺寸稳定性广泛的环境条件下优异的尺寸稳定性 仅次于氟树脂的耐化学药品性 仅次于氟树脂的耐化学药品性 高温、高湿、高频下良好的电绝缘性高温、高湿、高频下良好的电绝缘性 复杂的高精度的成型可能性复杂的高精度的成型可能性2DIC.PPSFig.2.
6、1 PPS聚合物的TGA热分解曲线Fig.2.1 PPS聚合物的TGA热分解曲线 Thermal oxidative stability of PPSTemperature, Weight ioss, wt %0255075100 200400600800In N In AirFig.2.2 PPS聚合物的DSC热分析谱图Fig.2.2 PPS聚合物的DSC热分析谱图 DSC chart of PPS polymerTemperature,Heat flow50100150200250300350Tc1TgMpMpTgAmorphas Crystalline2. PROPERTIES OF P
7、OLYMER 2.1. General Properties PPS polymer exhibits exceptional resistance to thermal oxidative degradation. Its decomposition temperature, as determined by thermo-gravimetric analysis (TGA), is over 500C in air and nitrogen atmosphere in Fig.2.1. The high decomposition temperature in the air is ind
8、icative of PPSs outstanding resistance to oxidation.Fig.2.3 PPS聚合物的粘弹性特性Fig.2.3 PPS聚合物的粘弹性特性 Mechanical dumping behavior of PPSTemperature, Storage modulus, E*Loss tangent, tan 20601001401802202601.E041.E031.E021.E001.E011.E02E* tan The PPS polymer is partially crystalline. As shown in Fig.2.2, the
9、glass transition temperature, Tg is approximately 90C, with the melting point, MP at about 280C. These values are critical for the mechanical properties of the molding compounds as the function of temperature, as illustrated by the dynamic dumping properties for the neat polymer in Fig.2.3. The prop
10、erties are measured by ASTM D5418 used dual cantilever loading. Typical crystalline polymer shows the reduction in mechanical properties at the temperatures above the glass transition region.2.2. Cross-Linked and Linear Polymers There are two types of PPS polymers as described in the above. The cros
11、s-linked or cured polymer is heat treated during production processes in the atmosphere of air and increased apparent molecular weight.This polymer contains partially cross linked molecular constructions and is characterized by high rigidity and small creep deformation or relaxation even at elevated
12、 temperatures comparing to linear polymer. On the other 2、PPS聚合物的性能2、PPS聚合物的性能2.1基本特性2.1基本特性PPS具有优异的耐热性。从Fig2.1所示的TGA 分析（热重分析）可以看出，在空气以及氮气气 氛下，PPS都具有热分解温度在500以上的高耐 热稳定性。从Fig.2.2所示的PPS树脂的DSC分析结果可以 看出，PPS的玻璃化转变温度：Tg大约为90，熔 点：MP大约为280，再结晶温度：Tc1大约为125 。这些温度对于PPS产品的机械性能等各种性能 来说具有重要的意义。这个重要性也体现在如图 Fig.2.3
13、所示的粘弹性中的阻尼特性与温度的关系 上。这个特性是按照ASTM D-5418标准，在频率 0.1HZ下采用双悬臂梁弯曲法测定的。它显示了结 晶树脂特有的在玻璃化转变温度以上，力学性能 急剧下降的特性。2.2. 交联PPS和线型PPS2.2. 交联PPS和线型PPS在上一节已经提到PPS树脂有交联型和线型两 种结构。交联型是在聚合物制作过程中，在氧气 环境下进行热处理，把分子量提高到必要的程度 而得到的。3DIC.PPSTableTable 2.1 交联型和线型PPS的储能模量：E2.1 交联型和线型PPS的储能模量：E Comparisons of storage modulus; Ebet
14、ween cross linked and linear PPS polymersTemperatureCross-linkedLinear234,000 MPa3,700 MPa80 3.7003,500100 2,5002,100120 1,000 800140 600 500hand, linear polymer shows low modulus and ductility. Also, this highly purified polymer has excellent dimensional stability even under hot and wet conditions
15、because of its lower water absorption than the cross-linked. In Table 2.1, the cross-linked polymer possesses higher rigidity than that of the linear under broad range of temperatures.The comparisons of properties between two types of PPS based compounds are shown in Fig.2.4.Fig.2.4 交联和线型PPS复合材料的性能比
16、较Fig.2.4 交联和线型PPS复合材料的性能比较 Comparison of cross-linked and linear PPS based compoundsToughnessCreep resistanceRigidityHeat resistanceResistance to hot compressive and shear properties are the similar to the tensile and flexural of it.Fig.4.6 压缩强度与温度的关系Fig.4.6 压缩强度与温度的关系Effect of temperature on compressive strengthTemperature,Compressive strength, MPa250200150100500602020601001401
