Investigation on the melt spinning fibers of PP/organoclay nanocomposites prepared by <i>in‐situ</i> polymerization

Hao, Chaowei; Zhao, Ying; He, Aihua; Zhang, Xiuqin; Wang, Dujin; Ma, Qingfang; Xu, Yizhuang

doi:10.1002/app.30392

Cited by 8 publications

(7 citation statements)

References 31 publications

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“…However, the organic solvent, extracting agent, and relevant devices have many issues, such as high cost, environmental pollution, and low production efficiency [4]. The melt spinning method makes up for the disadvantages that exist in the gel spinning method and is widely used in the industrial production of polyester (PET) fibers [5,6,7,8,9], polypropylene (PP) fibers [10,11,12,13], high-density polyethylene (HDPE) fibers [14], and other fibers. However, the extremely long molecular chains of UHMWPE are entangled together, resulting in a high viscosity after melting.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure Evolution of UHMWPE/HDPE Blend Fibers Prepared by Melt Spinning

et al. 2017

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Ultra-high molecular weight polyethylene (UHMWPE) and high-density polyethylene (HDPE) blend fibers with the highest tensile strength of 1.13 GPa were prepared by a melt spinning process. The mechanical behavior and crystal structure of the as-spun filaments and fibers were studied by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), X-ray diffraction (XRD), sound velocity orientation testing, and tensile testing. The orientation degree, crystallinity, tensile strength, and initial modulus of the fibers increased with the increasing of the draw ratios. The grain size was shortened in the radial direction and elongated in the axial direction. The results suggested that the improvement of the tensile strength and initial modulus was a result of the compact crystal structure formed by slender grains composed of highly oriented molecular chains. Blending with HDPE could improve the formation of a slender and compact crystal structure, and the tensile strength and initial modulus of the blend fibers were higher.

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Section: Introductionmentioning

confidence: 99%

Crystal Structure Evolution of UHMWPE/HDPE Blend Fibers Prepared by Melt Spinning

et al. 2017

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“…It is reported that PP/NA composites exhibit improved properties compared with its pristine polymer, such as higher modulus and strength, increased heat resistance and decreased gas permeability and flammability . Recently, several groups reported the successful melt spinning of PP/NA composite fibers . However, most of PP/NA fibers showed worse mechanical properties in the comparison of neat PP fibers .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, several groups reported the successful melt spinning of PP/NA composite fibers . However, most of PP/NA fibers showed worse mechanical properties in the comparison of neat PP fibers . This is probably because a real exfoliated nanocomposite structure was not formed in these fibers.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polypropylene/nanoclay composite fibers

Guo¹,

Hagström

2013

Polym Eng Sci

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Melt spinning of nanoclay (NA)/polypropylene (PP) composites into textile fibers is studied. The synthetic NA Perkalite F100 is prone to be exfoliated in PP matrix. With the help of a maleic anhydride‐grafted low‐molecular‐weight PP as compatibilizer (Epolene E43), a highly exfoliated PP/NA composite was successfully prepared. However, the prepared PP/NA composite shows a poor spinnability because of the phase separation between Epolene E43 and PP matrix. The combination of two different groups of compatibilizers, which are Polybond 1001 (acrylic acid‐grafted PP) for the dispersion of NA and Epolene G3216 (maleic anhydride‐grafted PP‐based copolymer) for the exfoliation of NA, can solve this problem. The PP/NA composite prepared by these two compatibilizers can be smoothly spun into fiber at the NA concentration below 1.9 wt%, which is found to be the percolation concentration of formation of NA network structure in PP matrix. POLYM. ENG. SCI., 53:2035–2044, 2013. © 2013 Society of Plastics Engineers

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“…This result is in good agreement with that obtained by XRD analysis. From Table 1, it can be noticed that the enthalpy of fusion (Δ ) for iPP/OBT nanocomposite increases compared to that of pure iPP or iP/PBT composite and therefore the high value of degree of obtained for the nanocomposite reflects an increase of iPP crystallinity as a result of the nucleation effect of the OBT [29,30]. Furthermore, as the aforementioned argument that the organoclay could act as the nucleating agent and accelerate the crystal growth of the iPP polymer, the crystallization temperature of the nanocomposite was clearly enhanced compared with that of the pure iPP or IPP/PBT composite ( Figure 6).…”

Section: Dsc Analysismentioning

confidence: 99%

Thermal Stability and Kinetic Study of Isotactic Polypropylene/Algerian Bentonite Nanocomposites Prepared via Melt Blending

Benhacine

Yahiaoui

Hadj‐Hamou

2014

Journal of Polymers

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Isotactic polypropylene (iPP)/bentonite nanocomposites were prepared via melt blending using bentonite clay originated from Maghnia (Algeria). This clay was, at a first stage, used in its pure form (PBT) and then organically modified by Hexadecyl ammonium chloride (OBT). The effect of Maghnia bentonite dispersion on the iPP matrix was investigated by X-ray diffraction (XRD) and transmission electronic microscopy (TEM). DSC results evidenced that unmodified or organomodified bentonite can act as a nucleating agent increasing the rate of crystallites formation. Moreover, a thermogravimetry analysis confirmed a significant enhanced thermal stability of IPP/clay nanocomposites compared to pure IPP. The Flynn-Wall-Ozawa and Tang methods were applied to determine the activation energy Ea of the degradation process. The apparent activation energy Eα of thermal degradation for IPP/clay nanocomposites was much higher than that of virgin iPP. Comparatively to PBT, results indicate that OBT has an important effect on pure iPP thermal stability. Tensile modulus, tensile strength, and elongation at break were also measured and compared with those of pure iPP.

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Investigation on the melt spinning fibers of PP/organoclay nanocomposites prepared by in‐situ polymerization

Cited by 8 publications

References 31 publications

Crystal Structure Evolution of UHMWPE/HDPE Blend Fibers Prepared by Melt Spinning

Crystal Structure Evolution of UHMWPE/HDPE Blend Fibers Prepared by Melt Spinning

Preparation of polypropylene/nanoclay composite fibers

Thermal Stability and Kinetic Study of Isotactic Polypropylene/Algerian Bentonite Nanocomposites Prepared via Melt Blending

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