• Title, Summary, Keyword: Polypropylene (PP)

Search Result 671, Processing Time 0.034 seconds

Physical Properties of Polypropylene Blended Yarns with Yarn Counts and Blended Ratio (Polypropylene 복합방적사의 섬도와 혼용율에 따른 물성)

  • Kim, Jeong-Hwa;Lee, Jung-soon
    • Fashion & Textile Research Journal
    • /
    • v.20 no.5
    • /
    • pp.600-607
    • /
    • 2018
  • Polypropylene fibers, while having many advantages such as light weight, sweat fast drying, water-repellent, drainage, thermal insulation, anti-static property has a drawback in dyeing. In recent years, the development of dyeable polypropylene fibers has expanded its value in the textile market. The purpose of this study is to fabricate composite spun yarns using polypropylene, acrylic, rayon and wool and to analyze tensile properties, uniformity characteristics, bending properties, hairiness, and surface shape according to the degree of fineness and blended ratio. The specimens consisted of 100% polypropylene spun yarn pp30, pp40 and ppa(pp/acrylic), ppr(pp/rayon), ppw(pp/wool), 5 altogether sed in this study. The results of the study are as follows. The breaking strength of polypropylene spun yarn blended with rayon and acrylic was higher than that of 100% polypropylene spun yarn. The polypropylene spun yarn is higher the fineness been shown to decrease the breaking strength and elongation. The bending properties of polypropylene spun yarns were in the order of ppa>ppr>pp40>pp30>ppw. The unevenness of ppw, ppr, and ppa was higher than pp40 and pp30. With the exception of ppw with crimp properties, pp30 and pp40 were found to have a hairiness index greater than ppr, ppa. In the microscopic photographs of polypropylene spun yarn, pp30, which had the highest hairiness index, was found to have a thick yarn and a large number of hairs, and ppw had hairs of 3 mm or more protruding elongated outwardly.

Preparation and Characterization of Metallocene-catalyzed Isotactic Polypropylene and/or Syndiotactic Polypropylene Single Crystals; Preliminary Studies

  • Park, Deuk-Kil;Park, Jin-Woo;Kim, Il;Ha, Chang-Sik
    • Journal of Adhesion and Interface
    • /
    • v.6 no.2
    • /
    • pp.1-5
    • /
    • 2005
  • Single crystals of metallocene-catalyzed isotactic polypropylene (iPP) and/or syndiotactic PP (sPP) were prepared and preliminarily characterized. The crystallization was performed utilizing 0.1 % by weight concentrations of each PP in o-xylene in the range of temperature of $40{\sim}90^{\circ}C$. Following the XRD patterns, samples were ${\alpha}$-iPP and antichiral Cell III of sPP. The XRD pattern of iPP shows three ${\alpha}$-form peaks due to the (110), (040), (130) planes at $2{\theta}=14.2^{\circ}$, $17^{\circ}$, $18.8^{\circ}$, respectively. The XRD pattern of sPP is characterized by the presence of the (020) reflection at $16^{\circ}$. The melting point ($123^{\circ}C$ and $148^{\circ}C$, respectively) of the metallocene catalyzed iPP and sPP were generally lower than that of conventional PP ($160{\sim}170^{\circ}C$) due to the misinsertion of the monomer. When metallocene-catalyzed iPP samples were crystallized isothermally from solution grown at a lower temperature, lozenge shape single crystals were observed by transmission electron microscopy (TEM).

  • PDF

Polypropylene Containing Small Amount of Polar Polymers(I) - Structure and Properties - (극성고분자를 첨가한 폴리프로필렌(I) -구호와 특성 -)

  • 손태원;김학묵;김영훈;이남순;전옥화
    • Textile Science and Engineering
    • /
    • v.39 no.2
    • /
    • pp.133-146
    • /
    • 2002
  • In order to develop dyeable polypropylene fibers, polypropylene-polar polymer blends and their blend fibers, which were prepared via melt blending of polypropylene(PP) with ethylene-vinyl acetate copolymer containing 28 wt% of vinyl acetate(EYA(28)) and 38 wt% of vinyl acetate (EVA(38)) and phenolic resin novolac (PRN), at various compositions, were studied. Solubility parameter, thermal property, flow behavior. mechanical property, morphology, and miscibility of the blends were investigated. The blends of PP/EVA(28) exhibited enough compatibility to give a blend having no clear phase seperation and had excellent fiber forming ability. It was found that additive polymers could be dispersed without phase separation in the order of EVA(28) > EVA(38) > PRN and they affected the mechanical properties of PP. PP/EVA(38) and PP/PRN blends showed considerable decrease in flow and mechanical properties compared to those of pure PP. But PP/EVA(28) blends did not show property.

Mechanical Properties and Morphology of Polyamide/Polypropylene Blends

  • Kim, Su Young;Ha, Jin Uk;Shin, Donghyeok;Jung, Wooseok;Lee, Pyoung-Chan
    • Elastomers and Composites
    • /
    • v.55 no.1
    • /
    • pp.1-5
    • /
    • 2020
  • This study examined the effects of the addition of maleic anhydride-grafted polypropylene (PP-g-MA) and polyolefin elastomer (POE) on polyamide 66 (PA66) and polypropylene (PP) blends. The blends of PA66/PP with PP-g-MA and POE were prepared using a twin screw extruder. Mechanical testing results revealed that the tensile, flexural, and izod impact strengths of the blends were maximized at a PP-g-MA content of 2 phr. The increased mechanical strength of the blends with PP-g-MA was attributed to the compatibilizing effect of the PA66 and PP blends. In addition, as the POE content increased, the impact strength of the blends increased. However, at a high POE content, the tensile and flexural strengths decreased, seemingly because of the lower mechanical properties of POE.

Polypropylene/Polyamide Elastomer Blends: Morphology and Mechanical Property (폴리프로필렌/폴리아미드 엘라스토머 블렌드: 모폴로지와 기계적 물성)

  • Liu, Qingsheng;Xu, Yan;Zhang, Hongxia;Li, Yuhao;Deng, Bingyao
    • Polymer Korea
    • /
    • v.38 no.5
    • /
    • pp.613-619
    • /
    • 2014
  • The polypropylene/polyamide elastomer (PP/PAE) blends were prepared by melt mixing. PP and PAE in PP/ PAE were immiscible completely. The size of PAE domains was large and the clear gap in the interface between PP and PAE existed, which did not meet the conditions enhancing toughness of polymers by elastomer. Therefore, maleic anhydride grafted polypropylene (MP) was used to improve the miscibility between PP and PAE. The miscibility between PP and PAE was improved and the size of dispersed phase PAE decreased by introducing MP. The crystallization of PP became easier by introducing PAE as a nucleating agent. With the increase of PAE content, the melt-crystallization temperatures of PP components in PP/PAE/MP blends increased gradually. The melt-crystallization of the polytetramethylene oxide segment of PAE component in PP/PAE blends were hampered by PP component. In addition, PAE can enhance significantly the toughness of PP, and the tensile strength and modulus did not decrease.

Modification and Properties of Polypropylene Fibers Using Aluminosiloxane

  • Yoon, Cheol-Soo;Ji, Dong-Sun
    • Fibers and Polymers
    • /
    • v.4 no.4
    • /
    • pp.210-214
    • /
    • 2003
  • Siloxylated polypropylene fibers composed of polypropylene (PP) and aluminosiloxane (AS) were prepared by melt blending followed by spinning. The effects of blend compositions on the thermal behaviors, surface and tensile properties of PP/AS blend fibers were investigated by DSC, WAXD, SEM, static honestometer, etc. The heat of fusion of PP/AS blends decreased with increasing AS contents. In addition, the peak intensity of PP/AS blends in X-ray diffraction patterns decreased with increasing AS contents. It was observed that the silicone molecules exist and well distribute on the surface of siloxylated polypropylene fibers. From the results of the half-life period measurements, the anti-static properties of PP fibers siloxylated with AS was found to be significantly modified.

Manufacturing of Polypropylene/Multiwalled Carbon Nanotube Composite Filaments via Melt Spinning (폴리프로필렌/탄소나노튜브 복합필라멘트 제조 및 특성분석)

  • Park, Gi-Ryong;Jeong, Young-Jin
    • Textile Science and Engineering
    • /
    • v.47 no.4
    • /
    • pp.261-265
    • /
    • 2010
  • The properties of polypropylene (PP)/multi-walled carbon nanotubes (MWNTs) composite were examined. MWNTs were wrapped with polypropylene-graft-maleic anhydride (PP-g-MA) followed by functionalization with hydrogen peroxide ($H_2O_2$) for good dispersion in a PP matrix. The $H_2O_2$-treated MWNTs were characterized by Raman spectroscopy (RAMAN) and Elemental analysis (EA). These results suggest that hydroxyl groups were introduced to the nanotube surface. The homogeneously dispersed PP/MWNT nanocomposites were prepared by melt mixing using a twin-screw extruder. The SEM images of the neat MWNTs and functionalized MWNTs showed that the functionalized MWNTs had been dispersed well in the matrix whereas the neat MWNTs (N-MWNTs) aggregated. Thermal analysis and the stress-strain data showed that the well dispersed MWNTs in the PP matrix greatly enhanced the mechanical and thermal properties of polypropylene.

Effect of Grafted Polypropylene on the Mechanical Properties of Polypropylene/Nylon 66 Blends (그라프트된 폴리프로필렌이 폴리프로필렌/나이론 66 블랜드의 물성에 미치는 영향)

  • Han, Kyung-Yoon;Ahn, Sung-Hwan;Chung, Kwang-Bo
    • Journal of the Korean Applied Science and Technology
    • /
    • v.28 no.4
    • /
    • pp.402-409
    • /
    • 2011
  • Compatibility and properties of PP/N66 blends with or without PP-g-MAH as a compatibilizer were investigated by DSC, SEM and universal testing machine. Morphological studies revealed that PP and N66 were incompatible and addition of PP-g-MAH was very effective to enhance the compatibility between PP and N66. The compatibilization effect between N66 and PP-g-MAH was based on the reaction between the amine end group of N66 and anhydride group in PP-g-MAH. The crystallization and melting behavior of PP/N66 blends were investigated and the results of analyses for enthalpy changed were discussed. The Izod impact strength could be improved by optimizing the compatibilizer concentration. Tensile strength, elongation at break, notched Izod impact strength were increased with using compatibilizer, however, both the compatibilized and the noncompatibilizer blends did not show any big difference in the flexural modulus.

A Study on the Dyeing Property of EVA Blended Polypropylene Fiber (EVA로 Blending된 Polypropylene Fiber의 염색성에 관한 연구)

  • 장철민;임상규;김삼수;손태원;서말용
    • Textile Coloration and Finishing
    • /
    • v.10 no.5
    • /
    • pp.13-18
    • /
    • 1998
  • Polypropylene-ethylene/vinyl acetate copolymer (PP-EVA) blends were prepared by mechanical blending using relatively semi-crystaline ethylene-vinyl acetate copolymer and polypropylene. In order to obtain dyeable PP fiber, PP-EVA blends were prepared using below 10wt.% of EVA and formed a filament by the melt spinning method. The resultant fibers had tensile strengh of 2∼3g/d, elongation of 330∼600%, initial modulus of 22∼46g/d, and exhibited markedly improved dyeing property.

  • PDF

The Effects of Surfactants Changes on Crystallization of Polypropylene Particles (계면활성제의 변화가 폴리프로필렌 입자의 결정화에 미치는 영향)

  • Park, Keun-Ho
    • Journal of the Korean Applied Science and Technology
    • /
    • v.30 no.3
    • /
    • pp.387-393
    • /
    • 2013
  • The crystallization of polypropylene (PP) particles in PP/decalin solution was conducted using the thermally induced phase separation(TIPS). During the control of particles sizes followed by the cooling of PP/decalin solution, particles were formed controllably, the concentrated PP resulted in an increase in the average diameter of PP particles. The effects of surfactants changes on particles sizes were investigated by using a field emission scanning electron microscope (FE-SEM). The PP crystals showed spherical shapes with a diameter 5~18 ${\mu}m$. Additionally, as an effect of concentration of PP, the size distribution of the PP particles became broad with higher concentration of PP in the solution.