Production and Dynamic Mechanical Analysis of Macro-Scale Functionalized Polydicyclopentadiene Objects Facilitated by Rational Synthesis and Reaction Injection Molding,ACS Applied Energy Materials

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Production and Dynamic Mechanical Analysis of Macro-Scale Functionalized Polydicyclopentadiene Objects Facilitated by Rational Synthesis and Reaction Injection Molding
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-08-15 00:00:00 , DOI: 10.1021/acsapm.9b00571
Tyler J. Cuthbert ₁ , Tong Li ₁ , Jeremy E. Wulff ₁

Affiliation

Polydicyclopentadiene (PDCPD) is a ring-opening metathesis polymer derived from dicyclopentadiene. Valued for its light weight, excellent material strength, and good performance at both high and low temperatures, PDCPD is used to make body panels for tractors and heavy-duty trucks. We recently described the first functionalized form of PDCPD (fPDCPD) that maintains the thermal stability of the parent polymer. However, while commercial PDCPD components are produced through a reaction injection molding process on a very large scale, our fPDCPD polymer was developed on a small scale and has not been shown to be a viable substrate for reaction injection molding processes. Here we address these limitations by providing an improved synthesis of the fDCPD monomer mixture on a half-kilo scale and describing a method for separating the polymerizable monomer from other nonpolymerizable regioisomers without chromatography. We further demonstrate a reaction injection molding process for the creation of prototype fPDCPD components. Together, these increases in scale and advances in small object manufacturing facilitate the production of regular-dimensioned samples for dynamic mechanical analysis, permitting the first direct comparison of the mechanical properties of C-linked ester-functionalized PDCPD with those of unmodified PDCPD. Additionally, by using monomers of different regioisomer purity, products are achieved encompassing a broad range of glass transition temperatures and storage/loss moduli.

中文翻译：

合理合成和反应注射成型促进宏观功能化聚二环戊二烯物体的生产和动态力学分析

聚二环戊二烯（PDCPD）是衍生自二环戊二烯的开环复分解聚合物。PDCPD因其重量轻，出色的材料强度以及在高温和低温下均具有良好的性能而受到重视，被用于制造拖拉机和重型卡车的车身面板。我们最近描述了保持母体聚合物热稳定性的PDCPD的第一个功能化形式（f PDCPD）。但是，尽管商用PDCPD组件是通过反应注射成型工艺大规模生产的，但我们的f PDCPD聚合物却是小规模开发的，尚未证明是用于反应注射成型工艺的可行基材。在这里，我们通过改进f的合成来解决这些限制。半公斤级的DCPD单体混合物，描述了无需色谱法即可将可聚合单体与其他不可聚合区域异构体分离的方法。我们进一步演示了用于创建原型f PDCPD组件的反应注射成型工艺。总之，这些规模的增加和小物体制造的进步促进了用于动态力学分析的规则尺寸样品的生产，从而允许将C连接的酯官能化的PDCPD与未改性的PDCPD的机械性能进行首次直接比较。另外，通过使用不同区域异构体纯度的单体，获得的产品涵盖了广泛的玻璃化转变温度和储能/损耗模量。

更新日期：2019-08-15

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