医疗级TPEE SC948美国杜邦
Applicationof TPEE products: TPEE is mainly used in areas re shockabsorption, impact resistance, flex resistance, sealability andelasticity, oil resistance, chemical resistance, and ade Such as: Polymer modified, automobile parts, high and lowtemperature resistant wire sheath, hydraulic hose, shoe material,transmission belt, rotary molded tire, flexible joint, mufflergear, elevator slide, chemical e, pipeline valve, parts ofanti-corrosion wear-resistant high and low temperature materials.TPEE is made by the copolymerization of terephthalic acid,1,4-Butanediol, and polybutanol. The increase of the hard segmentratio can enhance the physical rigidity and chemical stability, theflexibility and low temperature performance can be improved byincreasing the proportion of soft segment. Skypel is the trade nameof SK Chemical Company for its engineering Thermoplastic elastomer.It is an ESTER system of Thermoplastic Elastomer, its flexibilityand elastic resilience is similar to rubber, and mechanicalstrength, heat resistance and weather resistance than rubber. Novulcanization engineering, and the same as ordinary thermoplasticresin, with easy molding processing resin according to the usualpolyester synthesis method to properly adjust the content of theflexible segment of the COPOLYMER, so as to form a flexible andmechanical materials suitable for various uses.
1 简介
TPE E（ 热塑性 聚酯 弹性体 ）是含有聚酯硬段和 聚醚软段的嵌段共聚物。其中聚醚软段和未结晶的聚酯形成无定形相聚酯硬段部分结晶形成结晶微区，起物理交联点的作用。TPEE具有橡胶的弹性和工程塑料 的强度；软缎赋予它弹性使它象橡胶；硬段赋予它加工性能，使它象塑料；与橡胶相比，它具有更好的加工性能和更长的 使用寿命；与工程料相比，同样具有强度高的特点，而柔韧性和动态力学性能更好。
1．力学性能，通过对软硬段比例的调节，TPEE的硬度可以从邵氏30-82D，其弹性和强度介于橡胶和塑料之间。与其它 热塑性弹性体相比，在低应变条件下，TPEE 模量 比相同硬度的其它热塑性弹性体高。当以模量为重要的设计条件时，用TPEE可缩小制品的 横截面积，减少材料用量。TPEE具有极高的 拉伸强度 。与聚氨酯( TPU )相比，TPEE 压缩模量 与 拉伸模量要高得多用相同硬度的TPEE和TPU制作同一零件前者可以承受更大的负载。在室温以上，TPEE弯曲模量很高，而低温时又不象TPU那样过于坚硬因而适宜制作悬臂梁或扭矩型部件，特别适合制作高温部件。TPEE低温柔顺性好低温缺口冲击强度优于其他TPE，耐磨耗性与TPU相当。在低应变条件下，TPEE具有优异的耐疲劳性能且滞盾损失少，这一特点与高弹性相结合，使该材料成为多次循环负载使用条件下的理想材料，齿轮、胶辊、挠性联轴节、皮带均可采用。
2. Thermalproperties, TPEE has excellent heat resistance, the higher thehardness, the better the heat resistance; TPEE has no loss ofweight for 10 hours at 110 ~ 140 °C, and only 0.05% and 0.1% lossfor 10 hours at 160 °C and 180 °C respectively, so TPEE has a veryhigh temperature, short-term use temperature is higher, can adaptto the automotive production line baking temperature 150 ~ 160 °C,and it in high and low temperature, mechanical properties, loss issmall. The tensile strength of TPEE is much higher than TPU whenused at above 120 °C. Moreover, TPEE has excellent low temperatureresistance. The Brittle point of TPEE is lower than-70 °C and thelower the hardness is, the better the cold resistance is. Most TPEEcan be used at-40 °C for a long time. Due to the eance of TPEE at high and low temperatures, its operatingtemperature range is very wide and can be used at-70 ~ 200°C. 3.Resistance to chemical media, oil resistance of TPEE, resistance tomost polar liquid chemical media such as acids, bases, andamidodiols at room temperature, but not to halogenatedhydrocarbons, except freon, and the role of phenols, its chemicalresistance increases with the increase of its hardness. TPEE isgood for most organic solvents, fuels and gases, and is only 1 / 3to 1 / 300 of the oil-resistant rubber, such as Neoprene, Hypalonand nitrile rubber, but it is not good for hot water, thehydrolysis resistance can be improved obviously by addingpolycarboimide stabilizer. Weather Resistance, and agingresistance, TPEE in a lot of different conditions, such as waterfog, ozone, outdoor atmospheric aging conditions, chemicalstability, good. As with most elastomers, it degrades underultraviolet light, so for outdoor applications or products exposedto sunlight, UV protection AIDS should be added to the formulation,including carbon black, and a variety of pigments or othershielding materials; in addition TPEE also has varying degrees ofhydrolysis.