SISAL FIBER REINFORCED AND CENOSPHERE HYBRIDIZED POLYPROPYLENE-SEBS COMPOSITE: AN INSIGHT INTO CRYSTALLOGRAPHIC, DYNAMIC MECHANICAL AND RHEOLOGICAL BEHAVIOR.

The current study attempts to explore the crystallographic, rheological and dynamic mechanical properties of the submicron-treated cenosphere (t- CSF) particles and sisal fiber (SF) reinforced Styrene-(Ethylene-Butylene)-Styrene (SEBS) toughened PP hybrid composites. Moreover, the composites reinforced with 25 wt.% of SF and 5 wt.% of CSF (Treated 6 wt.% cetrimonium bromide (CTAB)) demonstrated the most significant storage modulus (E'), loss modulus (E"), and lowest damping (tan δ) factor throughout the temperature range. Likewise, X-ray diffraction techniques were used to assess the samples' crystallographic properties. The composites reported an enhanced ß phase (responsible for high impact strength and reduced α phase of the base matrix compared to pristine PP. Likewise, all the composites' rheological properties showed an improved complex viscosity (η*) compared to the BM but lower than that of the pristine PP. Overall processing parameters of the BM and composites were improved due to the decrement in the η* of all the composites. The rheological properties confirmed the easy processing of the fabricated composites due to the improved flowability. The storage (G') and loss (G") modulus of all the composites were desirably higher than that of the BM.

Manganese-catalyzed C-C and C-N bond formation with alcohols via borrowing hydrogen or hydrogen auto-transfer.

Transition-metal-mediated "borrowing hydrogen" also known as hydrogen auto-transfer reactions allow the sustainable construction of C-C and C-N bonds using alcohols as hydrogen donors. In recent years, manganese complexes have been explored as efficient catalysts in these reactions. This review highlights the significant progress made in manganese-catalyzed C-C and C-N bond-formation reactions via hydrogen auto-transfer, emphasizing the importance of this methodology and manganese catalysts in sustainable synthesis strategies.

Utilization of Ananas comosus Crown Residue Husk as a Sustainable Strength Additive for EPR/LDPE Blend Composites.

The utilization of waste generated by natural resources is a crucial problem nowadays. The current study describes the utilization of pineapple (Ananas comosus) crown residue husk (PCRh) as a strength additive for low-density polyethylene (LDPE) and ethylene propylene rubber (EPR) composites. The blend composites with 30% husk, 10 wt % EPR, and 60% LDPE content showed much better mechanical properties, such as tensile strength and flexural properties, than pristine LDPE and its binary composite with 10 wt % EPR. The high tensile strength (∼19.28 MPa) and tensile modulus (522.97 MPa) were obtained for the composite consisting of 30 wt % PCRh in the basic polymer matrix. Similarly, the highest flexural strength (∼18.09 MPa) and modulus (∼790.29 MPa) were recorded for the same composition. The incorporation of PCRh with LDPE and EPR was further characterized by attenuated total reflection-Fourier transform infrared, differential scanning calorimetry, field emission scanning electron microscopy, dynamic mechanical analysis, and a universal testing machine to evaluate its impact on various properties.