Effect of polymer branching on degradation during inkjet printing

Effect of polymer branching on degradation during inkjet printing
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聚合物支化对喷墨打印过程中降解的影响

DOI:
10.1016/j.polymdegradstab.2016.02.012
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发表时间:
2016
影响因子:
5.9
通讯作者:
Wheeler J
Wheeler J
中科院分区:
化学2区
文献类型:
--
作者:
Wheeler J

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在本文中,我们展示了高分子量超支化甲基丙烯酸酯聚合物用于喷墨印刷的潜力。采用Strathclyde方法,制备了一系列支化密度不断增加的超支化聚甲基丙烯酸甲酯聚合物。与同等线性聚合物相比,所有超支化聚合物都显示出显着更高的最大可打印浓度,这意味着更快的打印速度。发现在整个分子量分布中增加高于临界值的链支化可以抑制分子量下降。这种对分子降解的抵抗力是因为最长的链段要小得多,因此在喷射时聚合物迅速保持其热力学稳定的高斯线圈构象,并且打印头中收缩流的全部力不会传递到聚合物上并且降解受到抑制。我们进一步使用电子顺磁共振证明降解是通过自由基链断裂机制发生的。
In this paper we demonstrate the potential of high molecular weight hyperbranched methacrylate polymers for inkjet printing. Using the Strathclyde method, a series of hyperbranched poly (methylmethacrylate) polymers of increasing branch density were prepared. All hyperbranched polymers show both a significantly greater maximum printable concentration compared to equivalent linear polymers with implications for faster print speed. Increasing chain branching above a critical value across the molecular weight distribution was found to result in suppression of molecular weight degradation. This resistance to molecular degradation is because the longest chain segment being much smaller, such that upon jetting the polymer rapidly retains its thermodynamically stable Gaussian coil conformation and the full force of the constrictional flow in the print head is not passed on to the polymer and degradation is supressed. We further go on to show using Electron Paramagnetic Resonance that degradation occurs via a free radical chain scission mechanism.
溶液中单分散聚合物的拉伸流动和流变学
DOI: 10.1016/0377-0257(88)85018-3
发表时间: 1988
影响因子: 3.1
作者:
A. Müller;J. Odell;A. Keller
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连续喷墨打印过程中聚合物的降解
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发表时间: 2014
影响因子: 5.9
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DOI: --
发表时间: 2005
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