Influence of weathering effect in natural environment on thermal properties hybrid kenaf blast/glass fibre and unsaturated polyester composite M Mohammed, A R Rozyanty, B O Beta et al. (10, 20, 30, 40,and 80 wt.%) using mechanical blending method. The blends were cured at room temperature using methyl ethyl ketone peroxide (MEKP) (4 wt.%) as catalyst initiator without the presence of catalystaccelerator. The effect of vinyl ester composition on theenhancement of mechanical and thermal properties of unsaturated polyester/vinyl ester blends was investigated.The polymer blends were characterized by Fourier Transform Infra Red (FTIR)spectroscopy, tensile testing, hardness testing, scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). IR spectra showed UP and VE peaks. The curing copolymerization reactionoccurred at vinyl (C=C) bonds. The addition of vinyl esters enhanced mechanical and thermal properties. The UP/VE blends showed homogeneous morphology, transparent and copolymer thermoset blend.Keywords: unsaturated polyester, vinyl ester, polymer blend, thermal properties IntroductionUnsaturated polyester is a widely used thermosetting resin. Unsaturated polyester has a reactive vinyl (carbon-carbon double) bond. Styrene is added to unsaturated polyester as asolvent and acrosslinking agent for curing reaction. The organic peroxide is used to initiatethe reaction. Organic salt isadded to accelerate the reaction. The polymer is achieved as a result of random condensation copolymerization reaction between styrene and unsaturated vinyl double bonds by free radical mechanismforming crosslinked network structure [1,2]. Unsaturated polyester is a resin (prepolymer) with low price, light weight, easy processing and water resistance. Unsaturated polyester commonly used in laminating resin, composites, coating, adhesive, microelectronic, aerospace, building, automotive, and shipbuilding. However, unsaturated polyester shows limited mechanical and thermal properties. It is necessary to enhance the properties of unsaturated polyester.The properties of unsaturated polyester have been enhanced by theadditionof carbon fiber , fly ash, carbon nanotube, and polyamide [3][4][5][6]. Vinyl ester is an attractivehigh-performance thermoset polymer. Vinylester has reactive double bonds with rigid epoxy structure. Vinyl ester is synthesized by the reaction of epoxy with methacrylic

The increasing number of MSMEs (Micro, Small and Medium Enterprises) in Indonesia has had a positive contribution to Indonesia's economy, but many MSMEs unable to manage their business well. PT Selula Dwiphaloka Technologi is an MSME, a family business located in Bekasi City, Indonesia, that sells a custom-design machine for B2B customer. The data were collected using business coaching methods, a qualitative research that used to mapping MSME's condition and problem, then take a corrective action to implement solutions for improvement. The result shows that the MSME don't have a written SOP that can be used as guidance so the personal selling activity can be done consistenly, and also the website and company profile of MSME don't look very interesting. So, the solution is by developing SOP of personal selling, improving the website and company profile to support marketing activities. Surveys were also conducted to support evidence of the improvement result. As the results, there was a significant increase in the respondents' assessment of the visual aspects, information and overall appearance of the new website and company profile compared to the old ones. This study aims to help PT Selula Dwiphaloka Teknologi manage their marketing activities by creating SOP of personal selling, designing new website and company profile proposal.