環境測試室

Extensional Viscosity

Extensional viscosity measurements and a range of additional material tests are realized on the DHR with the Extensional Viscosity Accessory (EVA) or the SER3 Universal Testing Platform. Samples are secured to the surfaces of two windup drums which counter-rotate at equal speeds thanks to a system of intermeshing gears. At a constant drum rotation speed, a constant Hencky strain rate is applied to the sample. The sample stress that resists this deformation is measured by the torque transducer, allowing for the measurement of extensional viscosity. The frame of reference of these accessories is fixed, making it well-suited to sample imaging and optical analysis during deformation. In addition to extensional viscosity measurements on polymer melts, both accessories are capable of a range of physical property measurements such as tensile, peel, tear and friction testing on hard and soft solid samples

特色和優點

• 安全：無需使用液氮或其他冷卻氣體。
• 方便：無需更換、填充或訂購液氮。ACS-3隨時可投入使用。
• 小巧：比等效的液氮冷卻系統更節省空間。
• 價格實惠：與循環氣體運送相比能節省可觀費用。

低溫聚合物轉變

人們經常將聚合物混合以產生所需的韌性、模量和加工特性的組合。其中一種組合是聚碳酸酯(PC)與丙烯腈-丁二烯-苯乙烯(ABS)的混合物。ACS-3可提供足夠的溫控範圍來表徵這種多組分樣品的多種低溫和高溫轉變。該圖中的資料是在扭力作用下矩形試樣在溫度漸變過程收集的資料。