Wetting and localization of compatibilizers in biocomposites: A nanoscale evaluation and effects on physical properties

POLYMER

卷:185

Article

Niwa, Saori¹  Ogawa, Tatsuya¹  Ogoe, Shinji²  Teramoto, Yoshikuni^1,3,4 

[1] Gifu Univ, Fac Appl Biol Sci, Dept Appl Life Sci, 1-1 Yanagido, Gifu 5011193, Japan

[2] Toclas Corp, 1370 Nishiyarna Cho, Hamamatsu, Shizuoka 4328001, Japan

[3] Gifu Univ, Ctr Highly Adv Integrat Nano & Life Sci G CHAIN, 1-1 Yanagido, Gifu 5011193, Japan

[4] Gifu Univ, GU Composites Ctr, 1-1 Yanagido, Gifu 5011193, Japan

关键词: Maleic anhydride-modified polypropylene;    Cellulose;    Interface/interphase;   

DOI  :  10.1016/j.polymer.2019.121963

来源: Elsevier

【 摘 要 】

To elucidate the efficacies that have been empirically interpreted on compatibilizers, the interfacial adhesion in cellulosic filler/polypropylene (PP) biocomposites was investigated at the nanoscale. Maleic anhydride-modified PP (MAPP) with different weight fractions (w(MA)) of acid-modified groups was added as the compatibilizer. Two nanoscale aspects were examined: the degree of wetting of the compatibilizer on the microcrystalline cellulose (MCC) filler and the extent of compatibilizer localization. The degree of wetting was systematically evaluated via differential scanning calorimetry and was found to increase with w(MA). Transmission electron microscopy revealed that MAPP was located near MCC particles in MCC/MAPP/PP composites via thermal kneading, while only a part of the loaded MAPP was localized at the of MCC/PP interface. The MAPP layer thickness was similar to 50 nm and independent of w(MA). The increased degree of wetting with increasing w(MA) improved the rheological reinforcement effect, the withdrawal of MCC filler on the fracture surface, and the mechanical properties. Thus, MCC was probably tightly coated with the MAPP with high w(MA) and the interfacial tension with the PP matrix was decreased.

【 授权许可】

Free