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1. 发明授权

US5519319A Obtaining measurements of improved accuracy of one or more polymer properties with an on-line NMR system 失效
标题翻译：使用在线NMR系统获得改进的一种或多种聚合物性质的精度的测量
公开(公告)号：US5519319A
公开(公告)日：1996-05-21
申请号：US491632
申请日：1995-06-19
申请人： Thomas B. Smith , Scott A. Marino , Ronald J. Tache , David R. Day , Christian I. Tanzer , Tadd B. Hughes , Ajoy K. Roy
发明人： Thomas B. Smith , Scott A. Marino , Ronald J. Tache , David R. Day , Christian I. Tanzer , Tadd B. Hughes , Ajoy K. Roy
IPC分类号： G01R33/389 , G01R33/44 , G01R33/46 , G01V3/00
CPC分类号： G01R33/389 , G01N24/085 , G01N24/082 , G01R33/4625
摘要： A nuclear magnetic resonance (NMR) system, and related method, develops two or more regression equations or models for a particular polymer property of interest (e.g., melt index or MI) during a calibration procedure using known samples of a material. The polymer material can be, for example, a plastic (e.g., polyethylene, polypropylene, or polystyrene) or a rubber (e.g., ethylene propylene rubber). Regression models for one or more discrete (i.e., two-valued) variables also are developed during calibration, and these models allow a prediction to be made about which of the two or more property (e.g., MI) models should be used for any particular sample of unknown material. The prediction obtained from the discrete variable model indicates which of the two or more models will produce the most accurate estimation of the property of interest for the unknown sample. The best model is thus selected, and then it is used to estimate the property of interest.
摘要翻译：核磁共振（NMR）系统和相关方法在使用已知材料样品的校准过程期间针对特定的感兴趣的聚合物性质（例如熔体指数或MI）开发两个或多个回归方程或模型。聚合物材料可以是例如塑料（例如聚乙烯，聚丙烯或聚苯乙烯）或橡胶（例如乙丙橡胶）。在校准期间，还开发了一个或多个离散（即二值）变量的回归模型，这些模型允许对两个或多个属性（例如，MI）模型中的哪一个应用于任何特定的模型进行预测未知材料样品。从离散变量模型获得的预测表明两个或更多个模型中的哪一个将产生未知样本的关注属性的最准确估计。因此选择最佳模型，然后用于估计感兴趣的属性。

2. 发明授权

US5408181A NMR system for measuring polymer properties 失效
标题翻译：用于测量聚合物性质的NMR系统
公开(公告)号：US5408181A
公开(公告)日：1995-04-18
申请号：US113833
申请日：1993-08-30
申请人： Ronald L. Dechene , Thomas B. Smith , David R. Day , Christian I. Tanzer , Scott A. Marino , Ronald J. Tache , Ajoy K. Roy
发明人： Ronald L. Dechene , Thomas B. Smith , David R. Day , Christian I. Tanzer , Scott A. Marino , Ronald J. Tache , Ajoy K. Roy
IPC分类号： G01N24/08 , G01R33/31 , G01R33/32 , G01R33/36 , G01R33/44 , G01R33/563 , G01R33/20
CPC分类号： G01N24/085 , G01R33/31 , G01R33/563
摘要： A pulsed nmr analysis system for polymers materials extracted from industrial processes at a mobility enhancing temperature (at or above glass transition temperature for amorphous polymers, at the crystalline transition temperature for crystalline and semi-crystalline polymers). The sample is measured via nmr techniques and results correlated to viscosity and melt index or melt flow (which are related to average molecular weights). The nmr system (in or out of resonance) includes: sample throughput system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay curves (C), from which components functions are determined using linear or non-linear regression techniques to correlate the curve components to the target nuclei and to flow rates in plastics. Substantial improvement of correlation of nmr derived constants and equations of a free induction decay curve with the foregoing polymer properties is obtained via (1) conducting the nmr process at a mobility enhancing temperature (normally elevated compared to the industrial process temperature of the industrial process) and (2) holding temperature substantially constant at such elevated temperature.
摘要翻译：用于在工业过程中以迁移率增强温度（对于无定形聚合物的玻璃化转变温度以上，在结晶和半结晶聚合物的结晶转变温度下）提取的聚合物材料的脉冲nmr分析系统。样品通过nmr技术测量，结果与粘度和熔体指数或熔体流动相关（与平均分子量相关）。 nmr系统（进出谐振）包括：采样吞吐系统（P，LI，V1，V2）和用户系统控制（104）建立数字化的自由感应衰减曲线（C），从中可以使用线性或非线性回归技术来将曲线分量与目标核相关联，并使塑料中的流速相关。通过（1）以迁移率提高温度（与工业过程的工业过程温度相比通常升高）进行nmr工艺，获得具有上述聚合物性质的自由诱导衰变曲线的nmr导出常数和方程的相关性的显着改善，和（2）在这种升高的温度下保持温度基本恒定。

3. 发明授权

US5675253A Partial least square regression techniques in obtaining measurements of one or more polymer properties with an on-line nmr system 失效
标题翻译：使用在线nmr系统获得一种或多种聚合物性质的测量的部分最小二乘回归技术
公开(公告)号：US5675253A
公开(公告)日：1997-10-07
申请号：US586559
申请日：1996-01-16
申请人： Thomas B. Smith , David R. Day , Ajoy K. Roy , Christian I. Tanzer
发明人： Thomas B. Smith , David R. Day , Ajoy K. Roy , Christian I. Tanzer
IPC分类号： G01R33/32 , G01N24/08 , G01R33/389 , G01R33/44 , G01R33/46 , G01V3/00
CPC分类号： G01N24/085 , G01R33/389 , G01R33/4625 , G01N24/082
摘要： An on-line nuclear magnetic resonance (NMR) system, and related methods, are useful for predicting one or more properties of interest of a polymer. In one embodiment, a neural network is used to develop a model which correlates process variables in addition to manipulated NMR output to predict a polymer property of interest. In another embodiment, a partial least square regression technique is used to develop a model of enhanced accuracy. Either the neural network technique or the partial least square regression technique may be used in conjunction with a described multi-model or best-model-selection scheme according to the invention. The polymer can be a plastic such as polyethylene, polypropylene, or polystyrene, or a rubber such as ethylene propylene rubber.
摘要翻译：在线核磁共振（NMR）系统和相关方法可用于预测聚合物的一种或多种感兴趣的性质。在一个实施例中，使用神经网络来开发除了操纵的NMR输出之外关联过程变量以预测感兴趣的聚合物性质的模型。在另一个实施例中，使用偏最小二乘回归技术来开发增强精度的模型。神经网络技术或偏最小二乘回归技术可以与根据本发明的所描述的多模型或最佳模型选择方案结合使用。聚合物可以是诸如聚乙烯，聚丙烯或聚苯乙烯之类的塑料，或橡胶如乙丙橡胶。

4. 发明授权

US5650722A Using resin age factor to obtain measurements of improved accuracy of one or more polymer properties with an on-line NMR system 失效
标题翻译：使用树脂年龄因子通过在线NMR系统获得一种或多种聚合物性质的改进精度的测量
公开(公告)号：US5650722A
公开(公告)日：1997-07-22
申请号：US646084
申请日：1996-05-07
申请人： Thomas B. Smith , Ajoy K. Roy , Christian I. Tanzer
发明人： Thomas B. Smith , Ajoy K. Roy , Christian I. Tanzer
IPC分类号： G01R33/389 , G01R33/44 , G01R33/46 , G01V3/00
CPC分类号： G01R33/4625 , G01N24/085 , G01R33/389 , G01N24/082
摘要： A real-time, on-line nuclear magnetic resonance (NMR) system, and related method, can predict various properties of interest of a sample of polymer material. A regression or neural network technique is used to develop a model based upon manipulated NMR output and a resin age factor which compensates for time dependent aging phenomena and enhance predictive accuracy of the model. In a preferred embodiment, the resin age factor is a function of elapsed cycle time prior to sample measurement, sample temperature at time of measurement, and/or sample form. The polymer can be a plastic such as polyethylene, polypropylene, or polystyrene, or a rubber such as ethylene propylene rubber.
摘要翻译：实时的在线核磁共振（NMR）系统和相关方法可以预测聚合物材料样品的各种性质。回归或神经网络技术用于开发基于受控NMR输出的模型和树脂年龄因子，其补偿时间依赖的老化现象并增强模型的预测准确性。在优选实施例中，树脂年龄因子是样品测量之前经过的循环时间，测量时的样品温度和/或样品形式的函数。聚合物可以是诸如聚乙烯，聚丙烯或聚苯乙烯之类的塑料，或橡胶如乙丙橡胶。

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