02093nas a2200241   4500008004100000022001400041245014100055210006900196260008700265300001200352490000700364520116000371653002201531653001501553653001501568653002601583653003101609653003601640100001801676700001701694700001801711856012201729       2005                        eng d  a0892-705700aDurability of natural fiber-reinforced composites of ethylene-propylene copolymer under accelerated weathering and composting conditions0 aDurability of natural fiberreinforced composites of ethyleneprop  a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcNOV  a489-5080 v183 a<p>Three types of composites are prepared by the melt mixing of ethylene-propylene copolymer (EPC) with (i) 3 % NaOH-treated jute fiber, (ii) 17.5 % NaOH-treated jute fiber, and (iii) commercial microcrystal line cellulose powder using maleated EPC as compatibilizer. The composites obtained are characterized by FTIR and microscopic measurements. Their mechanical properties are measured using a UTM (Instron model 4204). The durability of the composites is evaluated in an irradiation chamber with UV radiation of wavelength lambda &gt;= 290 mn and composting conditions at different time intervals. The composites made from microcrystalline cellulose show superior mechanical properties, biodisintegrability, as well as photoresistance whereas the specimen containing 3% NaOH-treated fiber exhibited the lowest photoresistance. Increasing the quantity of maleated EP (MEP) in the composition decreases photostability. Neat EPC has been found to be highly stable than all the composites with increasing UV irradiation. It has been found that the composites are less durable under both abiotic and biotic conditions in comparison to the neat polymer.</p>10acompatibilization10acomposites10ajute fiber10amechanical properties10aMicrocrystalline cellulose10aphotodegradation and composting1 aKumar, A., P.1 aDepan, Dilip1 aSingh, R., P.  uhttp://library.ncl.res.in/content/durability-natural-fiber-reinforced-composites-ethylene-propylene-copolymer-under-002506nas a2200265   4500008004100000022001400041245010100055210006900156260007600225300001400301490000700315520155300322653002201875653003001897653001901927653001801946653001301964653003201977100002202009700002202031700002002053700002402073700002002097856012302117       2011                        eng d  a0959-810300aInfluence of reactive compatibilization on the structure and properties of PP/LDH nanocomposites0 aInfluence of reactive compatibilization on the structure and pro  aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcDEC  a1688-16960 v603 a<p>Polypropylene (PP)/layered double hydroxide (LDH) nanocomposites were prepared by the direct melt intercalation method usingmaleic anhydride grafted polypropylene (PP-g-MAH) as a reactive compatibilizer. The compatibilization effects provided by PP-g-MAH in different weight fractions and their influence on the structure and properties of the final nanocomposites were investigated. The interactions and structural morphology of the nanocomposites were examined by Fourier transform infrared spectroscopy, X-ray diffraction and transmission electronmicroscopy. Thermal, mechanical and rheological properties of these nanocomposites were investigated as a function of compatibilizer concentration. The detailed morphological and X-ray diffraction results revealed that the degree of LDH dispersion increases as the amount of PP-g-MAH increases. Study of the linear viscoelastic properties showed that the storage modulus G' is very sensitive to the microstructure of the nanocomposite. The thermal properties of the nanocomposites were significantly influenced by the weight fraction of PP-g-MAH due to the shielding and nucleating effect of exfoliated layers. Both the tensile strength and modulus showed substantial improvements with increasing PP-g-MAH content, while the elongation at break substantially decreased, although the presence of PP-gMAH somewhat improves these values. The overall results showed that 10 wt% of compatibilizer is optimum to achieve nanocomposites with better performance. (C) 2011 Society of Chemical Industry</p>10acompatibilization10alayered double hydroxides10aNanocomposites10apolypropylene10aRheology10athermomechanical properties1 aLonkar, Sunil, P.1 aTherias, Sandrine1 aLeroux, Fabrice1 aGardette, Jean, Luc1 aSingh, Raj, Pal  uhttp://library.ncl.res.in/content/influence-reactive-compatibilization-structure-and-properties-ppldh-nanocomposites-0