Effect of functionalization on non-isothermal crystallization behavior of polypropylene

Xia, Xufeng; Zhang, Junhui; Fan, Jiaming; Jiang, Qianlu; Xu, Shiai

doi:10.1080/1023666x.2016.1207128

Cited by 22 publications

(13 citation statements)

References 28 publications

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“…The characteristic absorption peaks at 2949 and 2867 cm −1 , 2919 and 2838 cm −1 are related to the stretching vibrations of C-H from -CH 3 and -CH 2 -groups, respectively; whereas those peaks at 1454 and 1375 cm −1 are related to C-H bending vibration [23]. New absorption peaks observed at 1856 and 1780 cm −1 in the FTIR spectra of the three functionalized PPs are attributed to the symmetric and asymmetric stretching vibration of the carbonyl groups (C=O) of MAH [9,11,24]. The absorption peaks observed at 1722 cm −1 in PP-g-MAH/ DAP and at 1690 cm −1 in PP-g-MAH/TAIC are assigned to the C=O of DAP and TAIC, respectively [25,26].…”

Section: Resultsmentioning

confidence: 93%

“…The crystallization and melt curves of pure PP, PP-g-MAH/St, PP-g-MAH/DAP and PP-g-MAH/TAIC are shown in figure 5, and the crystallization temperature (T c ), melt temperature (T m ), crystallization enthalpy (ΔH c ) and melt enthalpy (ΔH m ) obtained from figure 5 are listed in table 1. The T c values of the three functionalized PPs shift to higher temperatures compared with that of pure PP, which is attributed to the heterogeneous nucleation of the grafted MAH [24,27]. The T c values of functionalized PPs follow the order of PP-g-MAH/TAIC>PP-g-MAH/DAP>PP-g-MAH/St due to higher grafting degree of MAH.…”

Section: Dsc Analysismentioning

confidence: 90%

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Effect of co-monomer on the adhesive performance of PP-g-MAH between cast polypropylene film and aluminum foil

Shen

2020

Mater. Res. Express

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Three functionalized polypropylenes (PPs) were successfully prepared for use as the inner adhesive layer of aluminum/polymer laminated film by melt grafting of maleic anhydride (MAH) on PP with styrene (St), diallyl phthalate (DAP) and triallyl isocyanurate (TAIC) as co-monomers, respectively. The effects of these co-monomers (St, DAP and TAIC) on the grafting degree of MAH, gel content, thermal property and adhesive performance of MAH grafted PP (PP-g-MAH) were investigated. The results show that the T-peeling and heat-sealing strengths of TAIC-assisted PP-g-MAH (PP-g-MAH/ TAIC) are 28.6 and 70.4 N /15 mm, which are increased by 33.6% and 20.8% compared to DAPassisted PP-g-MAH (PP-g-MAH/DAP), and by 142.4% and 81.0% compared to St-assisted PP-g-MAH (PP-g-MAH/St), respectively. The grafting degree of MAH reaches a maximum of 2.3 wt% in PP-g-MAH/TAIC, which leads to a higher crystallization temperature than PP-g-MAH/DAP and PPg-MAH/St. PP-g-MAH/TAIC also has better thermal stability than the other two functionalized PPs, as TAIC can effectively reduce PP chain scission and promote the formation of a cross-linked structure during the melt grafting.

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Section: Resultsmentioning

confidence: 93%

Section: Dsc Analysismentioning

confidence: 90%

Effect of co-monomer on the adhesive performance of PP-g-MAH between cast polypropylene film and aluminum foil

Shen

2020

Mater. Res. Express

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“…CPP was purchased from Gloport Plastic Industries Co., Ltd. and used as the sealant layer. PP‐ g ‐MAH with a melt flow index of 5 g/10 min was prepared in an internal batch mixer in our laboratory …”

Section: Methodsmentioning

confidence: 99%

Preparation and adhesive properties of colored Ti/Zr‐based conversion coating on aluminum foil for lithium battery packaging

Wang

2018

Surface & Interface Analysis

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In this study, an aluminum (Al) foil used for lithium ion battery packaging film was treated with titanium (Ti)/zirconium (Zr) solution containing hexafluorotitanic acid and hexafluorozirconic acid using tannic acid as a colorant and metavanadate as an accelerator, respectively, and a golden conversion coating was successfully deposited on the surface of Al foil. The morphology and composition of the coating were characterized by scanning electron microscopy, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy, and the hydrophilicity was assessed by contact angle measurement. The effect of Ti/Zr treatment on the adhesion properties of Al foil was evaluated by T-peeling test and compared with that of traditional chromate-phosphate treatment. The results show that tannic acid contributes to the formation of the golden coating, and metavanadate accelerates the formation of the conversion coating. The results also indicate that the Ti/Zrbased conversion coating is mainly composed of . The Ti/Zr treatment cannot only improve the heatsealing strength, but also the T-peeling strength by approximately 12 times compared with that of untreated Al foil. Thus, Ti/Zr treatment has the potential to replace the traditional chromate conversion treatment.

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“…5). With the decrease of non-isothermal crystallization rate, the content of β crystal increases gradually, the content of α 1 crystal decreases gradually, and the content of α 2 crystal decreases gradually until it disappears which is mainly the crystallization at a lower cooling rate more perfect [27,28]. So the maximum content (Φ β ) of β crystal 92.1% when the cooling rate is 2.5 °C/min, which is higher than reported literature in the iPP/inorganic particle system [29][30][31][32].…”

Section: The Crystalline Structure and Morphology Of β Crystals Durinmentioning

confidence: 99%

Study of modified potassium feldspar as a novel β-nucleating agent to the crystal morphology and properties of polypropylene

et al. 2020

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In this paper, a modified potassium feldspar as high-efficiency polypropylene β-nucleating agent, which has the advantage of abundant resources and low price, was prepared by using bicyclo [2.2.1] hept-5-ene-2,3-dicarboxylic acid, We study the dosage of such nucleating agents affecting on β crystallization ability of isotactic polypropylene (iPP). Crystallization structure and morphology of the β nucleation of polypropylene are regulated and controlled by means of non isothermal crystallization, aiming that β crystal relative content (K β) of isotactic polypropylene reached 95.4%. Discussed the nucleation mechanism of the β-nucleating agent in the matrix and improved the toughness of iPP which is expected to realize the application of polypropylene in industry.

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Effect of functionalization on non-isothermal crystallization behavior of polypropylene

Cited by 22 publications

References 28 publications

Effect of co-monomer on the adhesive performance of PP-g-MAH between cast polypropylene film and aluminum foil

Effect of co-monomer on the adhesive performance of PP-g-MAH between cast polypropylene film and aluminum foil

Preparation and adhesive properties of colored Ti/Zr‐based conversion coating on aluminum foil for lithium battery packaging

Study of modified potassium feldspar as a novel β-nucleating agent to the crystal morphology and properties of polypropylene

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