Additive effects of tripalmitin on morphologies and tensile properties of polybutene-1 and its composite with micro fibrous cellulose

Miyazaki, Kensuke; Takahashi, Yuuta; Terano, Minoru; Nakatani, Hisayuki

doi:10.1007/s00289-013-0911-6

Cited by 4 publications

(10 citation statements)

References 13 publications

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“…Stretching [14][15][16][17][18], pressured carbon dioxide atmosphere [19,20], proper molecular weight [21,22], blending [23][24][25][26][27], stepwise annealing [28,29], copolymerization [30][31][32][33][34][35] and the addition of nucleating agent (NA) [36,37] were confirmed effective to accelerate the phase transition from form II to form I and the crystallization rate of PB. Of these methods, blending with polypropylene (PP) to make polybutene alloy (PB-A) and the addition of NA are more convenient ways to enhance the mechanical properties and crystal transformation rate [38][39][40][41] compared with others.…”

Section: Introductionmentioning

confidence: 99%

Effects of zinc isophthalate on the crystallization and crystal transformation behavior of polybutene alloy

et al. 2021

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The slow crystallization rate and crystal transformation restrict the application of PB-A (PB blended with 2-3wt% polypropylene). This paper investigated the effects of zinc isophthalate (ZnIA) on the crystallization and crystal transformation behavior of PB-A by means of DSC, POM, XRD and Flash DSC. The results showed that addition of ZnIA raised the crystallization peak temperature from 71.1 ℃ to 82.8 ℃ and decreased the half crystallization time from 818 s to 160 s at the content of 0.2wt%. It also reduced the spherulites size dramatically according to the images of POM. The survey conducted by Flash DSC showed that the formation of amorphous phase was retarded by the addition of ZnIA as cooling rate increasing and as a result, the crystallinity of PB-A was raised from 50.0 to 56.1% with 0.2wt% ZnIA added. Moreover, the improvement on crystal transformation caused by ZnIA could be owing to the increase in crystallization temperature which leads to the enhancement of internal thermal stress and shortened nucleating process as well before the growth of form I. In conclusion, Znic Isophthalate is a kind of effective and multifunctional nucleating agent for PB-A and this study is beneficial to understand the mechanism of crystallization as well as the crystal transformation for PB-A.

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Section: Introductionmentioning

confidence: 99%

Effects of zinc isophthalate on the crystallization and crystal transformation behavior of polybutene alloy

et al. 2021

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“…The scaling relationship between R g and M w is linear, as shown in Figure S1, which indicates that long chain branching does not occur in the sample. The comonomer content is accurately measured using 13 C NMR, as shown in Figure S2. According to the literature, 38,39 the tacticity and triad sequence concentration of Sample A can be calculated from 13 C NMR spectra.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The comonomer content is accurately measured using 13 C NMR, as shown in Figure S2. According to the literature, 38,39 the tacticity and triad sequence concentration of Sample A can be calculated from 13 C NMR spectra. As shown in Table 1, the ethylene comonomer content of Sample A is 5.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…8 Several researchers have utilized some strategies which can accelerate the phase transition, such as high pressure, pressured CO 2 , 14 solvent annealing, 11 and copolymerization with random 1-alkane co-units bearing fewer than five carbons. 9 PB-1 resin has been widely investigated in terms of its external factors, such as the crystallization temperature 20,21 and as a nucleating agent, 8,13 and some research on its internal factors is also reported in the literature. 22−26 De Rosa et al polymerized a range of isotactic PB-1 and copolymers and researched the crystallization behavior, the influence of stereodefects, and the mechanical properties.…”

Section: ■ Introductionmentioning

confidence: 99%

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Preparative Temperature Rising Elution Fractionation of One Poly(1-butene) Copolymer and Its Chain Microstructure Characterization

Xue

Liu

et al. 2019

Ind. Eng. Chem. Res.

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Generally, commercial P-TREF (preparative temperature rising elution fractionation) equipment carries out an experiment for polyolefin samples between room temperature (or the lowest temperature at 20 °C) and 150 °C. Although we have applied the traditional TREF method in polyethylene and propylene resin in our previous studies, it failed to fractionate poly(1-butene) with a polymorph structure. Up to now, it has been a challenge to realize an effective P-TREF separation procedure for poly(1-butene) resins. Based on the analysis and experiments, it was found that a low temperature was important for poly(1-butene) resin. Herein, a novel P-TREF instrument with a broad temperature range from −80 to 150 °C is designed and fabricated. By applying this equipment, one poly(1-butene) copolymer, i.e., 1-butene/ethylene random copolymer, is first effectively fractionated according to its crystallizability by the TREF principle. The main fractions are eluted at 30, 42, and 46 °C, corresponding to the weight percent of 12.81%, 18.05%, and 39.52%, respectively. Chain microstructures of the original resin and its fractions are further characterized by high-temperature gel permeation chromatography coupled with triple detectors (refractive index−laser light scattering−viscometer), 13 C-nuclear magnetic resonance spectroscopy ( 13 C NMR), and differential scanning calorimetry (DSC). With an increasing elution temperature from −30 to 46 °C, the ethylene content of the fractions decreases from 12.6 to 2.9 mol %; meanwhile, the isotacticity increases from 41.2% to 83.6%, and the crystallinity increases gradually. From these results, the TREF technique can be extended to resins (for example, poly(1-butene) copolymer) with slow crystallization kinetics, and the chain microstructure of polymorphic poly(1-butene) copolymer can be analyzed in detail. This will lay a foundation for both basic research and industry applications.

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“…The form II to form I transformation can take several weeks to complete and results in profound thermal and mechanical changes due to the significant difference in their melting temperature and density. , Thus, many efforts in the literature have been devoted to accelerating the form II to I transition and report that different approaches such as high pressure, , orientation and stretching, − incorporation of additives, , and copolymerization , can promote this transition. It has been shown that the form II to I transition is controlled by nucleation at the crystal surfaces or lamellar distortion points and strongly depends on the initial crystallization temperature and circumstance.…”

Section: Introductionmentioning

confidence: 99%

Nanoconfinement Induced Direct Formation of Form I and III Crystals inside in Situ Formed Poly(butene-1) Nanofibrils

et al. 2020

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We show that under relevant processing conditions, isotactic poly(butene-1) (iPB-1) directly crystallizes into the thermodynamically stable form I and III from the melt state when it is confined in nanocylinder shape domains. The iPB-1 nanofibers with an average diameter of about 200 nm confined in an incompatible polyethylene (PE) matrix show the kinetically favored form II in addition to form I. However, only form I and III are present when the average size of nanofibers is further reduced to about 60 nm after localization of organoclay nanoparticles at the interface of the iPB-1 nanofibers and PE matrix. Even though the materials were brought to temperatures higher than the melting temperature of iPB-1, the formation of unstable form II is completely suppressed by the nanoconfinement of the iPB-1 phase. It is believed that the nanoconfinement reduces the mobility of iPB-1 chains and consequently alters the kinetics of form II crystallization. The localization of organoclay at the interface completely further suppresses the formation of form II crystal by enhancing the confinement effect.

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Additive effects of tripalmitin on morphologies and tensile properties of polybutene-1 and its composite with micro fibrous cellulose

Cited by 4 publications

References 13 publications

Effects of zinc isophthalate on the crystallization and crystal transformation behavior of polybutene alloy

Effects of zinc isophthalate on the crystallization and crystal transformation behavior of polybutene alloy

Preparative Temperature Rising Elution Fractionation of One Poly(1-butene) Copolymer and Its Chain Microstructure Characterization

Nanoconfinement Induced Direct Formation of Form I and III Crystals inside in Situ Formed Poly(butene-1) Nanofibrils

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