TY - JOUR
T1 - High flow polypropylene/SEBS composites reinforced with differently treated hemp fibers for injection molded parts
AU - Panaitescu, Denis Mihaela
AU - Vuluga, Zina
AU - Sanporean, Catalina Gabriela
AU - Nicolae, Cristian Andi
AU - Gabor, Augusta Raluca
AU - Trusca, Roxana
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Polypropylene/hemp fibers (PP/HF) composites for injection molded car parts show several advantages compared to similar composites containing glass fibers (GF), however they have low impact strength, tensile strength and modulus. Here, hemp fibers modified by alkali and alkali-silane treatment were used to reinforce a polypropylene matrix modified with maleic anhydride grafted polypropylene (MAPP) and SEBS. The addition of HF in PP modified with MAPP and SEBS has increased not only the tensile strength and modulus (by 45% and 230%) but also the impact strength. Double tensile strength and triple Young's modulus were obtained in PP composites with alkali-silane treated HF (HFs) in the presence of MAPP and SEBS. Similarly, the HFs led to a significant increase of storage modulus, with about 100% at room temperature and with about 200% at 120 °C. Moreover, the onset degradation temperature increased with 51 °C for HFs containing composites compared to neat PP. PP/HFs composites modified with MAPP and SEBS showed improved mechanical and thermal properties, being considered as a viable alternative to PP/GF composites for injection molded parts in the automotive industry.
AB - Polypropylene/hemp fibers (PP/HF) composites for injection molded car parts show several advantages compared to similar composites containing glass fibers (GF), however they have low impact strength, tensile strength and modulus. Here, hemp fibers modified by alkali and alkali-silane treatment were used to reinforce a polypropylene matrix modified with maleic anhydride grafted polypropylene (MAPP) and SEBS. The addition of HF in PP modified with MAPP and SEBS has increased not only the tensile strength and modulus (by 45% and 230%) but also the impact strength. Double tensile strength and triple Young's modulus were obtained in PP composites with alkali-silane treated HF (HFs) in the presence of MAPP and SEBS. Similarly, the HFs led to a significant increase of storage modulus, with about 100% at room temperature and with about 200% at 120 °C. Moreover, the onset degradation temperature increased with 51 °C for HFs containing composites compared to neat PP. PP/HFs composites modified with MAPP and SEBS showed improved mechanical and thermal properties, being considered as a viable alternative to PP/GF composites for injection molded parts in the automotive industry.
KW - Mechanical properties
KW - Polymer-matrix composites (PMCs)
KW - Surface treatments
UR - http://www.scopus.com/inward/record.url?scp=85068123969&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2019.107062
DO - 10.1016/j.compositesb.2019.107062
M3 - Journal article
AN - SCOPUS:85068123969
SN - 1359-8368
VL - 174
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 107062
ER -