Poly(caprolactone)-based Plasticizers to reduce gas-check in PVC films

聚己内酯基增塑剂可减少 PVC 薄膜中的气体检查

• 批准号: 543853-2019
• 负责人: Maric, Milan
• 金额: $ 1.34万
• 依托单位: McGill 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=676975
• 关键词: Poly; caprolactone; based; Plasticizers; reduce

Plasticizers are used to increase the flexibility and workability of rigid polymers like poly(vinyl chloride) (PVC) for a myriad of commercial products such as wiring, cables, flooring and pool liners. For decades, di-2-ethylhexyl phthalate (DEHP; often termed dioctyl phthalate (DOP)) was the most common plasticizer used in PVC formulations. However, DEHP and its metabolites, particularly its monoester, have caused negative health effects, such as being an endocrine disruptor. Recently, DEHP was banned from use in children's toys and phthalate alternatives are rapidly being offered. We developed succinate-based esters that biodegrade to non-toxic metabolites after being discarded while also performing as well or better than DEHP in blend formulations. Further, we further optimized the process using green chemistry principles, using sustainable building blocks and reducing solvent, number of process steps and catalyst concentration. These green succinate ester plasticizers worked well as primary plasticizers for PVC. However, during our previous collaborations, we discovered that poly(caprolactone) (PCL) block co-oligomers were found to be very effective as secondary plasticizers, virtually eliminating gas-check, which is a phenomenon that limits production rates where air bubbles are entrained in the film when calendaring or roll-milling. The causes are not well described in literature. Our goal is to find the fundamental mechanism for gas-check reduction in PCL-block co-oligomer/PVC blends (due to either surface tension or rheological effects). In tandem with the industrial partner, we will determine the root causes for this effect and then design a suite of PCL-based secondary plasticizers tailored to various product lines. An economic evaluation of the derived PCL plasticizers will follow in preparation of scale-up. This project has potentially enormous industrial and socio-economic implications, as costly down-time is avoided while delivering another green plasticizer to market. The innovation from this CRD will create Canadian-based intellectual property, licensing opportunities and job creation due to being first on the market with such a product.

增塑剂用于提高聚氯乙烯（PVC）等刚性聚合物的柔性和可加工性，用于电线、电缆、地板和泳池衬里等无数商业产品。 几十年来，邻苯二甲酸二（2-乙基己基）酯（DEHP;通常称为邻苯二甲酸二辛酯（DOP））是PVC配方中最常用的增塑剂。 然而，DEHP及其代谢物，特别是其单酯，会对健康造成负面影响，例如成为内分泌干扰物。 最近，DEHP被禁止用于儿童玩具，邻苯二甲酸酯替代品正在迅速提供。 我们开发了基于琥珀酸酯的酯，其在被丢弃后可生物降解为无毒代谢物，同时在混合制剂中的性能也与DEHP一样好或更好。 此外，我们使用绿色化学原理，使用可持续的结构单元并减少溶剂、工艺步骤数量和催化剂浓度，进一步优化了工艺。这些绿色琥珀酸酯增塑剂作为PVC的主要增塑剂工作良好。 然而，在我们之前的合作中，我们发现聚（己内酯）（PCL）嵌段共聚低聚物被发现是非常有效的第二增塑剂，几乎消除了气裂，这是一种限制生产率的现象，其中气泡夹带在膜中时，粉碎或辊磨。 文献中没有很好地描述原因。我们的目标是找到减少PCL嵌段共聚低聚物/PVC共混物中气塞的基本机制（由于表面张力或流变效应）。 我们将与工业合作伙伴一起确定这种影响的根本原因，然后设计一套适合各种产品线的PCL基二次增塑剂。 衍生的PCL增塑剂的经济评价将遵循准备放大。 该项目具有潜在的巨大工业和社会经济影响，因为在向市场提供另一种绿色增塑剂的同时避免了昂贵的停机时间。 该CRD的创新将创造基于西班牙的知识产权，许可机会和创造就业机会，因为这是市场上第一个这样的产品。