Reactive Compatibilization of Poly(ethylene terephthalate) and High-Density Polyethylene Using Amino-Telechelic Polyethylene
Reactive Compatibilization of Poly(ethylene terephthalate) and High-Density Polyethylene Using Amino-Telechelic Polyethylene
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DOI：
10.1021/acs.macromol.6b02080
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发表时间：
2016-12-13
期刊：
影响因子：
5.5
通讯作者：
Hillmyer, Marc A.
中科院分区：
文献类型：
--
作者：
Todd, Alexander D.;McEneany, Ryan J.;Hillmyer, Marc A.
采用低摩尔质量（3-17 kg/mol）氨基遥爪聚乙烯（ATPE）通过酯胺解反应增容聚对苯二甲酸乙二醇酯（PET）和高密度聚乙烯（HDPE）。在熔融共混过程中，将叔丁氧羰基（Boc）保护的聚乙烯前体热脱保护以得到反应性胺末端。模型反应的光谱分析证实了所得材料中存在酰胺官能度。通过共混研究，我们发现，低负载量的ATPE（0.5重量%）显着减少了分散的HDPE相颗粒的体积的一个因素，8倍相比，二元PET/HDPE共混物，通过扫描电子显微镜（SEM）进行评估。力学分析表明，与未改性的PET/HDPE共混物相比，增容的共混物的断裂伸长率增加了12倍。最终，这里的结果提供了一种新的方法来反应增容和增韧PET/HDPE共混物，并打开了大门，为其他用途的氨基遥爪聚乙烯。
Low molar mass (3-17 kg/mol) amino-telechelic polyethylene (ATPE) was used to reactively compatibilize poly(ethylene terephthalate) (PET) and high-density polyethylene (HDPE) via ester aminolysis of PET. A tertbutyloxycarbonyl (Boc)-protected polyethylene precursor was thermolytically deprotected during the melt-blending process to render the reactive amine termini. Spectroscopic analysis of a model reaction confirmed the presence of amide functionality in the resultant material. Through blending studies, we found that low loadings of ATPE (0.5 wt %) significantly reduced the volume of the dispersed HDPE phase particles by a factor of 8 when compared to a binary PET/HDPE blend as assessed by scanning electron microscopy (SEM). Mechanical analysis of the ATPE-compatibilized blends showed a 12 fold increase in the elongation at break over the unmodified PET/HDPE blend. Ultimately, the results here offer a new approach to reactively compatibilize and toughen PET/HDPE blends and open the door for other uses of amino-telechelic polyethylene.