Polymer degradation during continuous ink-jet printing
Polymer degradation during continuous ink-jet printing
复制标题
连续喷墨打印过程中聚合物的降解
DOI：
10.1016/j.polymdegradstab.2014.04.007
复制
发表时间：
2014
影响因子：
5.9
通讯作者：
Wheeler J
中科院分区：
文献类型：
--
作者：
Wheeler J
结果报告的第一次在一个完整的商业喷墨打印机的聚合物降解的可能性和原因。研究了分子量分别为90、310和468 kDa的三种线型聚甲基丙烯酸甲酯（PMMA）样品在连续喷墨（CIJ）Domino A系列+打印机中的行为，并与先前报道的两种按需喷墨（DOD）打印机（DimatixTM-2800和Microfab单喷嘴玻璃毛细管）的实验结果进行了比较。尽管所有三个打印头在喷嘴尖端处具有相等的应变速率（ε），但是在单独的CIJ头内没有观察到退化，而在两个DOD打印头中观察到单程退化。这可归因于许多因素的结果，包括略大的喷嘴直径和不同的喷嘴几何形状，包括锥角和喷嘴圆柱体长度，对于CIJ，不同的液滴生成模式或研究的较高聚合物浓度。还应注意的是，通过CIJ喷嘴的流是连续的，其中在DOD的情况下其是脉冲的。计算出的最大应变率是相似的，但在国防部，它是定期斜升和关闭。在CIJ打印通过CIJ多米诺A系列+打印机聚合物降解的主要来源被发现是连续循环的油墨通过泵，导致机械化学聚合物降解。分子量降解通过随机断裂进行，并且在较低的剪切速率下获得，所述较低的剪切速率是由于泵中的机械-化学损伤而导致的较长停留时间的结果。这些结果在用于输送高分子量聚合物和对机械化学降解敏感的材料的喷墨系统的总体设计中具有重要意义，并且突出了当从基于实验室的打印工具移动到全尺寸应用时需要仔细考虑。
Results are reported for the first time on the possibility and cause of polymer degradation in a full commercial inkjet printer. The behaviour of three linear poly(methyl methacrylate) (PMMA) samples, havingMw90, 310 and 468 kDa respectively, in a continuous inkjet (CIJ) Domino A-Series+ printer is investigated and compared with earlier reported results for two experimental drop on demand (DOD) printers, a Dimatix DMP-2800 and a Microfab single nozzle glass capillary. Despite all three printheads having equivalent strain rate at the nozzle tip (ε) no degradation is observed within the CIJ head alone whereas single pass degradation is observed in both DOD printheads. This can be attributed to a consequence of a number of factors including the slightly greater nozzle diameter, and different nozzle geometry, which includes cone angle and nozzle cylinder length, for CIJ, the different mode of drop generation or the higher polymer concentration investigated. It should also be noted that the flow through the CIJ nozzle is continuous, where it is pulsed in the case of DOD. The calculated maximum strain rates are similar, but in DOD it is being periodically ramped up and switched off.The main source of polymer degradation in CIJ printing through a CIJ Domino A-Series+ printer is found to be the continuous recycling of ink through the pump resulting in mechano-chemical polymer degradation. Molecular weight degradation proceeds by random scission, and is obtained at the lower shear rates experience as a consequence of the longer residence time due to mechano-chemical damage in the pump. These results have significance in the total design of inkjet systems for the delivery of high molecular weight polymers and materials sensitive to mechano-chemical degradation and highlight the need for careful consideration when moving from laboratory based print tools to full scale application.
登录
查看更多内容
聚（三芳胺）摩尔质量分布对有机场效应晶体管行为的影响
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
M. Madec;J. Morrison;M. A. Rabjohns;M. Turner;S. Yeates
通讯作者：
S. Yeates
聚合物拉伸流动理想Zimm动力学的普适性
DOI：
--
发表时间：
1985
期刊：
影响因子：
--
作者：
Y. Rabin
通讯作者：
Y. Rabin
影响因子：
4.6
作者：
James Merrington;P. Hodge;S. Yeates
通讯作者：
James Merrington;P. Hodge;S. Yeates
可喷墨打印水性复合染料聚合物纳米颗粒
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
J. H. Wilson;R. Bradbury;T. Annable;S. Yeates
通讯作者：
S. Yeates
喷墨打印流体
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
S. Yeates;Desheng Xu;M. Madec;Dolores Caras;K. Alamry;Andromachi Malandraki;V. Sanchez
通讯作者：
V. Sanchez