当前位置：
X-MOL 学术
›
ACS Appl. Polym. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Immiscible Polymer Blends Compatibilized through Noncovalent Forces: Construction of a “Quasi-Block/Graft Copolymer” by Interfacial Stereocomplex Crystallites
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2022-11-08 , DOI: 10.1021/acsapm.2c01630 Yihang Chen 1 , Jiali Wu 1 , Yingding Qu 1 , Xiayan Ling 1 , Hengti Wang 1 , Yongjin Li 1
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2022-11-08 , DOI: 10.1021/acsapm.2c01630 Yihang Chen 1 , Jiali Wu 1 , Yingding Qu 1 , Xiayan Ling 1 , Hengti Wang 1 , Yongjin Li 1
Affiliation
|
Interfacial compatibilization is acknowledged to be the most effective approach to improve interfacial strength between the thermodynamically immiscible components of polymer blends. However, the compatibilizer, mainly achieved by graft or block copolymers, necessarily connected by covalent bonds, can rarely be satisfied presently. Herein, we propose a concept of “quasi-block/graft copolymer” to compatibilize the immiscible polyolefin elastomer (POE) and poly(styrene-acrylonitrile-glycidyl methacrylate) (SAG) blends. The quasi-block/graft copolymer was achieved by the stereocomplex crystals (SC) of poly-l-lactic acid (PLLA) and poly-d-lactic acid (PDLA) moieties that reactively grafted on the main chains of the components. By taking advantage of the interfacial compatibilization through noncovalent forces, the microphase morphology of the blend can be adjusted and the mechanical properties can be improved: firstly, the curvature of the phase interface decreases significantly, facilitating co-continuous morphology on account of the “rigid” interfacial layers; secondly, the tensile strength and modulus of the blend are obviously improved; thirdly, the original phase structure of the blend can be well maintained during long-term annealing due to the high melting point of the interfacial SC. This strategy of compatibilizing immiscible blends by using the hydrogen bonding force of the stereocomplex opens up an idea for interfacial compatibilization.
中文翻译：
通过非共价力相容的不混溶聚合物共混物：通过界面立体复合微晶构建“准嵌段/接枝共聚物”
界面相容化被认为是提高聚合物共混物热力学不混溶组分之间界面强度的最有效方法。然而，相容剂主要通过接枝或嵌段共聚物实现，必须通过共价键连接，目前很少能得到满足。在此，我们提出了“准嵌段/接枝共聚物”的概念，以增容不混溶的聚烯烃弹性体（POE）和聚（苯乙烯-丙烯腈-甲基丙烯酸缩水甘油酯）（SAG）共混物。准嵌段/接枝共聚物是通过聚-l-乳酸（PLLA）和聚-d的立构复合晶体（SC）实现的-乳酸 (PDLA) 部分反应性接枝在组分的主链上。利用非共价力的界面增容作用，可以调整共混物的微相形态，提高力学性能：首先，相界面的曲率显着降低，促进共连续形态，因为“刚性” ” 界面层；其次，共混物的拉伸强度和模量明显提高；第三，由于界面SC的高熔点，在长期退火过程中可以很好地保持共混物的原始相结构。这种利用立构复合物的氢键力增容不混溶混合物的策略为界面增容开辟了思路。
更新日期：2022-11-08
中文翻译：
通过非共价力相容的不混溶聚合物共混物：通过界面立体复合微晶构建“准嵌段/接枝共聚物”
界面相容化被认为是提高聚合物共混物热力学不混溶组分之间界面强度的最有效方法。然而，相容剂主要通过接枝或嵌段共聚物实现，必须通过共价键连接，目前很少能得到满足。在此，我们提出了“准嵌段/接枝共聚物”的概念，以增容不混溶的聚烯烃弹性体（POE）和聚（苯乙烯-丙烯腈-甲基丙烯酸缩水甘油酯）（SAG）共混物。准嵌段/接枝共聚物是通过聚-l-乳酸（PLLA）和聚-d的立构复合晶体（SC）实现的-乳酸 (PDLA) 部分反应性接枝在组分的主链上。利用非共价力的界面增容作用，可以调整共混物的微相形态，提高力学性能：首先，相界面的曲率显着降低，促进共连续形态，因为“刚性” ” 界面层；其次，共混物的拉伸强度和模量明显提高；第三，由于界面SC的高熔点，在长期退火过程中可以很好地保持共混物的原始相结构。这种利用立构复合物的氢键力增容不混溶混合物的策略为界面增容开辟了思路。
京公网安备 11010802027423号