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Reactive Core-Shell Bottlebrush Copolymer as Highly Effective Additive for Epoxy Toughening

Chinese Journal of Polymer Science 2021年第12期39卷 1626-1633页

作者： Junsoo Moon Yoon Huh Seonghwan Kim Youngson Choe joona.Bang Department of Chemical and Biological Engineering Korea UniversitySeoul 02841Republic of Korea Department of Chemical Engineering Pusan National UniversityPusan 46241Republic of Korea

Herein,we designed a core-shell structured bottlebrush copolymer(BBP),which is composed of rubbery poly(butyl acrylate)(PBA)core and an epoxy miscible/reactive poly(glycidyl methacrylate)(PGMA)shell,as an epoxy tougheni ng age *** PGMA shell allows BBP to be uniformly dispersed within the epoxy matrix and to react with the epoxy groups,while the rubbery PBA block simultaneously induced nanocavitation effect,leading to improvement of mechanical properties of the epoxy *** mechanical properties were measured by the adhesion performance test,and the tensile and fracture test using universal testing *** BBP additives were added to the epoxy resin,a sign ifica nt improveme nt in the adhesion stren gth(2-fold increase)and fracture toughness(2-fold in crease in Kic and 5-fold in crease in Gic)compared to the neat epoxy was *** contrast,linear additives exhibited a decrease in adhesion strength and no improvement of fracture toughness over the neat *** a difference in mechanical performance was investigated by comparing the morphologies and fracture surfaces of the epoxy resins containing linear and BBP additives,confirming that the nanocavitation effect and void formation play a key role in strengthening the BBP-modified epoxy resins.

关键词： Bottlebrush polymer ROMP Additive Adhesion Epoxy toughening

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nanowire encapsulation with polymer for electrical isolation and enhanced optical properties

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nano Research 2017年第8期10卷 2657-2666页

作者： Tuomas Haggren Ali Shah Anton Autere joona.Pekko Kakko Veer Dhaka Maria Kim Teppo Huhtio Zhipei Sun Harri Lipsanen Department of Micro- and nanosciences Micronova Aalto University P.O. Box 13500 Fl-00076 Aalto Finland

Light management and electrical isolation are essential for the majority of optoelectronic nanowire （nW） devices. Here, we present a cost-effective technique, based on vapor-phase deposition of parylene-C and subsequent annealing, that provides conformal encapsulation, anti-reflective coating, improved optical properties, and electrical insulation for GaAs nanowires. The process presented allows facile encapsulation and insulation that is suitable for any nanowire structure. In particular, the parylene-C encapsulation functions as an efficient antireflection coating for the nanowires, with reflectivity down to 〈1% in the visible spectrum. Furthermore, the parylene-C coating increases photoluminescence intensity, suggesting improved light guiding to the nWs. Finally, based on this process, a nW LED was fabricated, which showed good diode performance and a clear electroluminescence signal. We believe the process can expand the fabrication possibilities and improve the devices. performance of optoelectronic nanowire

关键词： antireflection GaAs parylene-C metallo-organic vapor phase epitaxy (MOVPE) annealing light emitting diode (LED)

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利用环烷基油生产更为环保的轮胎

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中国橡胶 2005年第24期21卷 21-23页

作者： Marika joona.薛小栋

一、前言长期以来,在轮胎中使用高芳烃抽提油(DAE)作为增塑剂一直是较为理想的选择.高芳烃油具有很多应用方面的优点,譬如与轮胎中所使用橡胶的高度相容性、良好的润湿性能等,价格也相对较低.

关键词：环烷基油 MES 纳斯滚动阻力湿附着力轮胎工业橡胶工业高芳烃油环烷油

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