Morphology development of physical polymer mixtures in sintering based processing technologies

基于烧结的加工技术中物理聚合物混合物的形态发展

• 批准号: 523208-2018
• 负责人: Thompson, Michael
• 金额: $ 1.97万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=681909
• 关键词: Morphology; development; physical; polymer; mixtures

Polymer sintering technologies are used to manufacture parts of dimensions ranging from metres to microns, with simple or complex structures, based on the melt coalescence of powders. Rotational molding is the more mature technology in this area where 3D printing by selective laser sintering is still emerging. Both methods form products that are often difficult or impossible by other polymer processing approaches. However, the absence of shear stresses in both has created limitations on the materials selected with these technologies, which has in turn kept them out of markets reliant on more advanced properties. North America has the largest concentration of rotational molding manufacturers globally and 3D printing methods are considered integral to Canada's high technology economy, making both strategically important to our manufacturing sector. It is beneficial to Canada that we advance their capabilities to complete in market sectors where more advanced properties are demanded. Broadening the properties to satisfy the needs of new applications, mixtures of polymers are often combined to form complex phase morphologies. Stable blend morphologies of two or more polymers are commonly produced in the presence of shear and elongational stresses. With an absence of shear stresses, the options for rotational molding and selective laser sintering (SLS) are only to use pre-compounded materials, which add considerable costs, or to consider a poorly understood alternative where physical mixtures of polymers are sintered to form a blend. This proposal will increase the industry's understanding of this less expensive alternative by sintering a physical mixture and will compare its findings to pre-compounded materials. The goal of the studies is to identify approaches whereby desirable blend morphologies arise by controlling composition, viscosity ratio, resin compatibility, crystallinity and particle packing density. The intent is to deliver a statistical model which the industrial sponsor and others may use to predict final properties as they are related to the morphology formed.

聚合物烧结技术用于制造尺寸的一部分，范围从米到微米，具有简单或复杂的结构，基于粉末的融合结合。旋转成型是该领域中更成熟的技术，在该领域，通过选择性激光烧结的3D打印仍在出现。 两种方法都形成了其他聚合物加工方法通常困难或不可能的产品。但是，两者中缺乏剪切应力已经对使用这些技术选择的材料产生了局限性，这反过来又使它们脱离了依赖更先进的属性的市场。 北美在全球旋转成型制造商的集中度最高，而3D打印方法被认为是加拿大高科技经济不可或缺的一部分，这对我们的制造业而言至关重要。 对加拿大，我们提高了他们在需要更高级物业的市场领域完成的能力。 扩大特性以满足新应用的需求，通常将聚合物的混合物组合在一起以形成复杂的相形态。 在存在剪切和伸长应力的情况下通常会产生两个或多个聚合物的稳定混合形态。 在没有剪切应力的情况下，旋转成型和选择性激光烧结（SLS）的选项仅使用预发的材料，这些材料增加了相当大的成本，或者考虑了一个较差的聚合物物理混合物而被烧结以形成混合物的替代方案。 该提案将通过烧结物理混合物来提高行业对这种较便宜的替代方案的理解，并将其发现与预发的材料进行比较。研究的目的是确定通过控制成分，粘度比，树脂兼容性，结晶度和颗粒堆积密度来产生理想的混合形态的方法。目的是提供一个统计模型，工业赞助商和其他人可能用来预测最终属性，因为它们与形成的形态有关。