回复tdyxsq发表于:2020/9/2 19:11:21悬赏金额:
1积分 状态:
未解决
DSC检查方法:
For Polyethylene—Determine the thermogram under nitrogen at temperatures between 40° and 200° at a heating rate between 2° and 10° per minute followed by cooling at a ratebetween 2° and 10° per minute to 40°
这句话的意思是,检测的初始温度是40°,结束温度是200°,升温速度在2°和10°之间,然后冷却速度在2°和10°之间,直到降到40°?
难道说升温速度我可以随便设置,而且一定要升高之后还有降温?
The thermogram of thespecimen is similar to the thermogram of USP Low-Density Polyethylene RS,similarly determined, and the temperature of the endotherm (melt) in thethermogram of the specimen does not differ from that of the USP ReferenceStandard by more than 8.0°.
这里的判断标准仅仅是melt不超过对照品的8°?
谢谢各位专家,我是DSC新手,有点看不懂这个。