Lightweight micro-cellular plastics from polylactide/polyolefin hybrids
Lightweight micro-cellular plastics from polylactide/polyolefin hybrids
复制标题
由聚丙交酯/聚烯烃混合物制成的轻质微孔塑料
DOI：
10.1016/j.polymer.2016.08.102
复制
发表时间：
2016
期刊：
影响因子：
4.6
通讯作者：
Hillmyer, Marc A.
中科院分区：
文献类型：
--
作者：
Xu, Yuewen;Delgado, Paula;Todd, Alexander D.;Loi, Jesse;Saba, Stacey A.;McEneany, Ryan J.;Tower, Ted;Topolkaraev, Vasily;Macosko, Christopher W.;Hillmyer, Marc A.
以半结晶聚乳酸/聚烯烃多组分共混物为先驱体，制备了一类新型微孔聚合物。聚丙烯弹性体(PBE)或聚丙烯(PP)均聚物被用作10wt%水平的分散相。引入了一种环氧官能化三元共聚物(PEGMMA)作为反应性相容剂，以减小分散相的液滴尺寸，并在基质和分散相之间提供足够的粘附力。此外，在共混物中加入聚烷二醇液体(PAG)作为聚乳酸增塑剂和界面改性剂。与纯聚乳酸相比，多组分共混物的断裂应变显著增加，并在室温下承受一定范围的单轴应变(10%-90%)。扫描电子显微镜显示，这些冷拔材料具有几乎恒定的横截面积和细小的微孔结构。含PBE和PP的共混物的不同排空机理可归因于分散相弹性模数和变形性能的不同。与先驱体共混物相比，冷拔共混物的材料密度降低了34%，横截面面积没有明显变化。新型低密度微孔聚乳酸共混物表现出优异的力学性能，如高强度、高模数、显著的延展性，以及与聚乳酸均聚物相比，抗冲击性提高了14倍。
Semi-crystalline polylactide (PLA)/polyolefin multi-component blends were used as precursors for the generation of a new class of micro-cellular polymers. Either a polypropylene-based elastomer (PBE) or polypropylene (PP) homopolymer were utilized as dispersed phases at the 10 wt% level. An epoxy-functionalized terpolymer (PEGMMA) was introduced (1 wt%) as a reactive compatibilizer to reduce the dispersed phase droplet size and provide sufficient adhesion between the matrix and dispersed phase. In addition, a polyalkylene glycol liquid (PAG) was added to the blend (4 wt%) to serve as a PLA plasticizer and interfacial modifier. The multicomponent blends exhibited significant increases in strain at break as compared to neat PLA and were subjected to a range of uniaxial strains (10–90%) at room temperature. These cold drawn materials exhibited nearly constant cross-sectional area and fine micro-cellular structures, as revealed by scanning electron microscopy. Distinct different voiding mechanisms observed for the PBE- and PP-containing blends were ascribed to the differences in the dispersed phase elastic moduli and deformability. The material density of cold drawn blends was reduced by up to 34% when compared to the precursor blends without a noticeable change in cross-sectional area. The novel low-density microcellular PLA blends demonstrated outstanding mechanical properties such as high strength, high modulus, substantial ductility, and a 14-fold increase in impact resistance as compared to PLA homopolymer.
登录
查看更多内容
影响因子：
5.5
作者：
Pan, Pengju;Zhu, Bo;Inoue, Yoshio
通讯作者：
Inoue, Yoshio
线性低密度聚乙烯和聚苯乙烯共混物的失效机制
DOI：
--
发表时间：
1996
期刊：
影响因子：
--
作者：
T. Li;V. Topolkaraev;A. Hiltner;E. Baer
通讯作者：
E. Baer
单轴拉伸对填充聚四氟乙烯性能和结构的影响
DOI：
--
发表时间：
2014
期刊：
影响因子：
--
作者：
Dongna Zhang;Kaichang Kou;P. Gao;Yu Zhang;Zhen
通讯作者：
Zhen
影响因子：
4.2
作者：
Xu, Yuewen;Loi, Jesse;Hillmyer, Marc A.
通讯作者：
Hillmyer, Marc A.
DOI：
10.1002/polb.20094
发表时间：
2004-06
期刊：
Journal of Polymer Science Part B
影响因子：
--
作者：
Van Casteren;van Ram Trier;Jgp Han Goossens;H. H. Meijer-H.;Pj Piet Lemstra
通讯作者：
Van Casteren;van Ram Trier;Jgp Han Goossens;H. H. Meijer-H.;Pj Piet Lemstra