Comonomer effect on the mechanical and morphological behavior on the calcite‐filled PP, CoPP, and TerPP

Kim, Hyun; Kim, Kwang Jae; Kwon, Sae Min; Kundu, Patit Paban; Jo, Byung Cheon; Lee, Byung Hyung; Lee, Dae Soo; Choe, Soonja

doi:10.1002/app.11162

Cited by 16 publications

(12 citation statements)

References 17 publications

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“…20,21 In the present investigation, although LLDPE system displays small sizes of air holes than the previous report, 20,21 the PP system in the present study does not exhibit any air hole. Despite the same composition, the marked difference in the morphology may originate from the film preparation method.…”

Section: Morphologycontrasting

confidence: 73%

Effect of calcite and calcite/zeolite hybrid fillers on LLDPE and PP composites

et al. 2004

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ABSTRACT:The comparative tensile and impact properties and fracture morphologies between calcite and calcite/zeolite (hybrid) filled linear low-density polyethylene (LLDPE) and polypropylene (PP) composites have been studied. The incorporation of fillers into LLDPE, whether calcite or calcite/zeolite hybrid fillers, does not alter the T m of LLDPE, but slightly reduces the T m of PP. The melting peak area representing the heat of fusion of the crystal decreases with fillers; the effect of the calcite and the hybrid filler would be the same. The impact strength, Young's modulus, and yield stress of the calcite and the hybrid filled LLDPE increased, indicating a reinforcing effect of the fillers. In addition, the filled LLDPE decreases in elongation at break (EB) and ultimate tensile strength. However, the hybrid LLDPE composite exhibits slightly higher Young's modulus and ultimate tensile strength than the calcite one, while the same values of impact strength and yield stress were observed. In the PP system, the Young's modulus is enhanced, whereas the rest of the mechanical properties were reduced. From SEM photomicrographs of the hybrid filled composites, the tensile fractured surface CALCITE AND CALCITE/ZEOLITE HYBRID FILLERS ON LLDPE AND PP COMPOSITESof LLDPE dumbbell bar exhibits tearing surfaces while the composite shows formation of air holes and cracks in the LLDPE and PP system, respectively. Because of improved Young's modulus, yield strength, impact strength, and morphological observation along with substantial extension, the filled LLDPE composite with calcite/zeolite hybrid fillers is worth using for micro-porous film applications. C

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Section: Morphologycontrasting

confidence: 73%

Effect of calcite and calcite/zeolite hybrid fillers on LLDPE and PP composites

et al. 2004

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“…Thus, the volatile extractives on the PW surface seemed to form a thin layer on the PW surface. The above observation seemed to be similar to (b) that of stearic acid coated calcite filled PP and PE compounds, in which the initial dewetting of the PP and the PE from stearic acid coated calcite surface forms air holes around calcite particles and crack propagates [19,20]. Baer and co-workers broadly investigated the failure analysis of particulate-filled thermoplastic polyester and discussed by illustrating the five fracture modes based on stress-strain behavior [21 -23].…”

Section: X-ray Diffraction Orientationmentioning

confidence: 64%

Interfacial adhesion of pine wood filled PP compounds via effects of volatile extractives

Kim

Bumm

White

2008

Composite Interfaces

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Effects of volatile extractives in pine wood (PW) particles are investigated upon interfacial adhesion, nucleation behavior and mechanical properties in polypropylene (PP) matrix. Various concentrations of the PW are filled in PP, i.e. PP/PW [90/10 (PP10), 75/25 (PP25) and 50/50 wt% (PP50)]. As the concentration of the PW particles is increased, the crystalline peak temperature is increased, the melting peak temperature is decreased, the elongation strain is decreased and the amount of volatile extractives in the PW is increased. Few spherulites are locally developed at the interface between the PW and the PP. The PW acts as a nucleating agent; however, it does not help reinforcing of the PP/PW compounds.The volatile extractives in the PW particles seems to evaporate-and migrate-out during the processing and then coats the pine wood surface, trapped in the compound, and migrats out to the wall surface. This results in a poor interfacial adhesion between the PW and the PP.

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“…However, owing to its low modulus, high notch sensitivity, and poor impact resistance, especially under extreme conditions such as low temperatures or high strain rates, the usefulness of PP as an engineering thermoplastic is still limited. So, the challenge of increasing the impact toughness and modulus of PP has provoked considerable interest [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and morphologies of polypropylene with different sizes of calcium carbonate particles

Yang

et al. 2006

Polym. Compos.

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Three polypropylene (PP) matrixes with different intrinsic toughness were used to study the morphologies and mechanical properties of PP filled with four sizes of calcium carbonate particles. PP1 was a homopolymer, PP2 was a propylene-ethylene copolymer, and PP3 was a mixture of PP1 and PP2 (PP1:PP2 ‫؍‬ 1:1, weight ratio). Calcium carbonate (CC25, CC4, CC1.8, and CC0.07) with an average particle size of 25, 4, 1.8, and 0.07 m, respectively, was used. It was clear that the PP matrix and filler size had key effects on improvement of mechanical properties of PP matrix. For all three PP matrixes, the yield strength, the flexural strength and modulus of the composites filled with CC25, CC4, and CC1.8 could be regarded as the same. But the yield strength, the flexural strength and modulus of composites filled with CC0.07 were obviously lower than those of composites filled with other sizes of particles. Among four sizes of calcium carbonate particles, CC0.07 had the best toughening effect to improve the impact strength of PP matrix, and the toughening effect of CC0.07 was influenced by PP matrix. For all PP matrixes, only in the case of moderate matrix toughness (PP3 matrix), the composite could receive the highest extent of toughness increase (4.3 times that of matrix). With regard to all PP composites, the best combination of properties was PP2 nanocomposite filled with 20 wt% CC0.07. POLYM. COMPOS., 27:443-450, 2006.

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Comonomer effect on the mechanical and morphological behavior on the calcite‐filled PP, CoPP, and TerPP

Cited by 16 publications

References 17 publications

Effect of calcite and calcite/zeolite hybrid fillers on LLDPE and PP composites

Effect of calcite and calcite/zeolite hybrid fillers on LLDPE and PP composites

Interfacial adhesion of pine wood filled PP compounds via effects of volatile extractives

Mechanical properties and morphologies of polypropylene with different sizes of calcium carbonate particles

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