公开(公告)号：US3774440A

公开(公告)日：1973-11-27

申请号：US3774440D

申请日：1972-01-10

Applicant: STANFORD RESEARCH INST

Inventor： MARTINELLI F

IPC: G01N25/04 ,  G01N3/20 ,  G01N25/00

CPC classification number: G01N25/04

Abstract: An instrument for determining polymer deflection temperatures, said instrument comprising a container holding an elongated sample of the polymer in a suspended position between its samplesupporting side walls, together with a plunger slidably engaged within said container and having a lower, wedge-shaped end which initially comes to rest against the undeflected sample in a position transverse to the longitudinal axis of the sample. A heater is employed to progressively elevate the temperature of the sample until the same deflects under the weight of the plunger, together with means associated with the plunger for signifying the resulting downward movement thereof and means for determining the temperature of the sample as this movement of the plunger occurs. In one embodiment, this downward movement of the plunger is detected by an electrobalance so arranged that a small suspended weight, spring-connected to the balance arm, is fully supported by the plunger as the latter rests against the nondeflected sample. This support is removed as the plunger moves downwardly with sample deflection, thereby causing a weight gain to be recorded by the electrobalance. The temperature of the sample at this point of weight gain is simultaneously read out from a thermocouple.

Abstract translation: 一种用于确定聚合物偏转温度的仪器，所述仪器包括容纳聚合物的细长样品在其样品支撑侧壁之间的悬挂位置的容器，以及可滑动地接合在所述容器内并具有下部楔形端 其最初在垂直于样品的纵轴的位置抵靠未偏转的样品。 使用加热器逐渐升高样品的温度，直到在柱塞的重量下相同的偏转，以及与柱塞相关联的装置，用于表示其产生的向下运动，以及用于确定样品的温度的装置， 发生柱塞。 在一个实施例中，柱塞的这种向下运动通过电动平衡来检测，所述电动平衡装置被布置成使弹簧连接到平衡臂的小悬挂重量被柱塞完全支撑，因为柱塞抵靠未偏转的样品。 当柱塞随着样品偏转向下移动时，该支撑被移除，从而通过电气平衡来记录体重增益。 同时从热电偶读出在此增重点处的样品的温度。