Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2015 / V.27,no.3,Sept Title Properties of Randomly Oriented Chopped E-glass Reinforced Unsaturated Polyester Based Resin Composite -Effect of Length/Content of E-Glass Fiber and Number of Stacking- Authors Jin-Myung Park, Young-Gwang Park, Young-Hee Lee, Dae-Kyung Seo1, Jang-Hun Lee1 and Han-Do Kim† Institution/Affiliations Pusan National University, 1Korea Dyeing and Finishing Technology Institute Pages/Total page pp.165 ~ 174 / 10 Language Korean Abstract Abstract: To develop automobile parts, the unsaturated polyester based matrix resin(PR)/reinforcement(randomly oriented chopped E-glass fiber, GF) composites were prepared using sheet molding compound(SMC) compression molding. The effects of GF length(0.5, 1.0 1.5 and 2.0inch)/content (15, 20, 25, 30wt%) and number of ply(3, 4 and 5) on the specific gravity and mechanical properties of PR/GF composites were investigated in this study. The optimum length of GF was found to be about 1.0inch for achieving improved mechanical properties(tensile strength and initial modulus). The tensile strength and initial modulus of composites increased with increasing GF content up to 30wt%, which is favorable content range for SMC. The specific gravity, tensile strength/initial modulus, compressive strength/modulus, flexural strength/modulus and shear strength increased with increasing the number of ply up to 5, which is the maximum number of ply range for SMC. The effectiveness of ply number increased in the flexural strength > shear strength > compressive strength > tensile strength. Keywords Keywords: unsaturated polyester based resin composite, randomly oriented chopped E-glass fiber, sheet molding compound(SMC) compression molding, automobile parts, fiber reinforced plastic Download   Reference http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2015_v27n3_165&ordernum=1