晶体中的原子或分子以周期性和规则的方式组织。结晶度指的是固体产物(例如粉末和颗粒)中结构顺序的程度。与结晶聚合物相比,无定形聚合物缺乏一定程度的结晶,并且行为的行为完全不同。
可以在包括塑料瓶在内的大量聚合物材料中创建无定形区域和晶体区域的组合。亚博网站下载在这些情况下,可以通过控制结晶度的程度来改变过程方法。这种方法对聚合物的密度,硬度,扩散和透明性具有重大影响。通常将其视为晶体材料的体积百分比。
Organizations that manufacture plastic bottles have to ensure the strength, consistency, and overall quality of products. This can be done by validating the degree of crystallinity in blown bottle walls. Calorimetric or X-ray diffraction methods can be used to determine crystallinity in a lab. However, these techniques are not accurate all of the time, and are relatively slow. This means that the results will not be readily available for inclusion in a Certificate of Analysis for end-user purposes.
但是,可以使用这些问题来克服FT-NIR技术,这有助于快速且无损地测量塑料瓶的结晶度。可以在几秒钟内检查单个瓶子,即使没有任何分析专业知识的运营商也可以轻松进行测试。
尽管FT-NIR方法具有与标准实验室技术相似的可重复性,但在稳健性和可重复性方面,它的重现性要好得多。在这里,ABB MB3600-CH40 FT-NIR仪器用于确定聚乙烯瓶的结晶度(图2)。该设备还用于测量瓶墙的水分含量和厚度。
图1。MB3600-CH80宠物包装分析仪
申请详细信息
概括
88个聚乙烯瓶(包装样品)中结晶度百分比的定量测量。
方法
测试期间使用以下参数:
- 采样方法:位于采样端口的完整瓶。
- Instrument:MB3600
- Detector: InAs TE-cooled
- 化学计量学模型:部分最小二乘(软件范围MB量化)
- 分辨率:8厘米-1
- 扫描数:16(12s /样品)
- 分析温度:室温
Figure 1 shows the calibration performance, and Table 1 shows crystallinity in range, R2和secv。
图2。校准性能
表格1。Degree of crystallinity
财产 |
范围(%) |
r2 |
secv(%) |
结晶度 |
23.8-32.1 |
0.91 |
0.7 |
Key User Benefits of ABB FT-NIR
- 一个样本的多组分分析
- Quick results, within 1 minute
- 替代品相对较慢的湿化学技术
- 允许测量物理和化学特征
- 每次分析的低成本
- Eliminates the need for consumables, reagents, or solvents
建议的仪器-MB3600 -CH80宠物包装分析仪
A robust industrial FT-NIR instrument, the MB3600-CH80 PET packaging analyzer allows rapid analysis of PET containers such as bottles, jars, and preforms. It is suitable for QA/QC labs, research and development centers, and the manufacturing lines of companies that measure the key properties of PET containers on a daily basis.
With the aid of the MB3600-CH80 instrument a number of PET quality features, like intrinsic viscosity, crystallinity, wall thickness, and moisture content, can be accurately measured.
还可以在几秒钟内进行调查,使该仪器成为相对较慢的实验室技术的合适替代品。
There is no need to prepare specific samples or instruments, and measurements are made in a fully non-destructive manner. The operator has to simply place the PET sample to be examined in the analyzer sampling compartment and follow the instructions that are displayed on the screen.
When using the MB3600-CH80 PET packaging analyzer for product analysis, factors like analytical expertise, chemical reagent, or waste disposal are no longer needed.
Turnkey Solution
With an unparalleled FT-NIR calibration expertise, ABB provides turnkey solutions to determine the crystallinity in PET containers. Made out of over 150 PET bottles, the calibrations are pre-loaded on the system and configured in the easy-to-use interface. As soon as the FT-NIR has been installed, users can start their investigations on PET containers. A statistical indicator is measured automatically for each assay to evaluate the quality of the sample recognized by the instrument. In case PET formulations are different or unique from the calibration database, automatic warnings will be displayed. This notifies users that the FT-NIR calibration needs to be tuned to include certain samples of this formulation and to further improve the model’s robustness. Atypical samples or those surpassing the range of crystallinity specified by the pre-loaded model will be rejected automatically.
多功能性
除结晶度外,PET的以下特性还可以用MB3600-CH80 PET包装分析仪确定:
- 固有的粘度
- Density
- 室壁厚度
- 水分含量
- 酸值
- 羟基值
上述属性基于最终用户可以开发的定制校准模型,也可以由ABB提供。特定的采样配件也可以作为选项引入。其中包括用于分析一次性闪烁体中熔化的塑料或液体的通用式小瓶持有者,以及用于分析颗粒,粉末,不透明包装和其他类型固体的粉末采样器。这些配件放置在MB3600-CH80的采样室中,并通过USB端口连接到分析仪以促进自动识别。配件可以轻松交换。
最低所有权成本
MB3600-CH80宠物包装分析仪具有最低的所有权成本,并且具有较小占地面积的垂直设计。由ABB工程师设计的MB3600-CH80分析仪的模块化组件根据下面的原理扩展了产品寿命:
- 没有调整
- No maintenance
- 没有扫描机制的磨损
- 没有消耗品
配备电子稳定功能,预先对准的源模块设计为工作10年,而无需更换。基于固态激光器的计量模块的寿命为20年。MB3600-CH80宠物包装分析仪中使用的非高光谱光学器件可确保不再需要仪器清除以进行光学保护。实验室分析的成本也大大降低,而实验室吞吐量和产品一致性大大提高。
领先的全球供应商的支持和可靠性
ABB是实验室和工艺分析系统的领先供应商,在开发FT-NIR和FT-IR光谱仪的空间,军事和工业应用方面拥有超过四十年的专业知识。为了进行流程优化,该公司为工业应用提供了一系列的应用程序支持和自定义校准建模服务。此外,ABB提供了全球的完整客户培训计划和售后支持和工程服务。
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