High temperature gel permeation chromatography

高温凝胶渗透色谱

• 批准号: 345983-2007
• 负责人: Soares, Joao
• 金额: $ 10.78万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=363927
• 关键词: temperature; gel; permeation; chromatography

Polyethylene and polypropylene are high-tonnage plastics used to make bottles, grocery bags, wrapping films, automotive parts, and several other applications. These plastics, known as polyolefins, are very important because of their versatility, low cost and non-toxicity.    Polyolefins are versatile because their molecules can be altered to make products with properties for different application. By changing the distribution of molecular sizes of polyethylene (formally know as the molecular weight distribution - MWD), it is possible to make plastics that have properties varying from those of waxes (small molecules) to those of very strong materials such as the ones used to make gas pipes (very large molecules). To better understand these materials, it is fundamental to characterize them at the molecular level. This molecular characterization can then be used to enhance the quality of different polyolefin-made products.    The MWD of polyolefins is measured with laboratory instruments called high-temperature gel permeation chromatography (HT-GPC). This instrument is of the utmost importance for understanding polyolefin production and applications. We are currently very active in this area and own an old model HT-GPC that is not reliable anymore. The objective of this grant proposal is to purchase a new HT-GPC for our laboratories with several modern features that will provide significantly more accurate information on the nature of polyolefins we produce.    The knowledge of the MWD of polyolefins is fundamental for the study of polymerization catalysis, kinetics of polymerization processes, polymer processing and structure-property relationships. We have a very active, long-term research program in all these areas, funded by both industry and government; this program will be greatly enhanced by the acquisition of this new GPC instrument.

聚乙烯和聚丙烯是高吨位塑料，用于制造瓶子、杂货袋、包装膜、汽车零部件和其他几种应用。这些被称为聚烯烃的塑料非常重要，因为它们的多功能性、低成本和无毒。其他聚烯烃之所以多才多艺，是因为它们的分子可以改变，以制造具有不同应用性能的产品。通过改变聚乙烯分子大小的分布(正式名称为分子量分布-MWD)，可以制造具有从蜡(小分子)到非常坚固的材料(如用于制造燃气管道的材料(非常大的分子))的各种特性的塑料。为了更好地理解这些材料，在分子水平上对它们进行表征是至关重要的。这种分子表征可以用来提高不同聚烯烃产品的质量。通常，聚烯烃的MWD是用称为高温凝胶渗透色谱(HT-GPC)的实验室仪器测量的。该仪器对了解聚烯烃的生产和应用具有重要意义。我们目前在这一领域非常活跃，拥有一台不再可靠的旧型号HT-GPC。这项拨款提案的目的是为我们的实验室购买一台具有几个现代特征的新的HT-GPC，它将提供关于我们生产的聚烯烃性质的更准确的信息。因此，聚烯烃的MWD知识是研究聚合催化、聚合过程动力学、聚合物加工和结构-性能关系的基础。我们在所有这些领域都有一个非常活跃的长期研究计划，由行业和政府提供资金；收购这个新的GPC仪器将极大地加强这一计划。