Characterization of polypropylene/hydrogenated styrene-isoprene-styrene block copolymer blends and fabrication of micro-pyramids via micro hot embossing of blend thin-films

Jiang, Guiyang; Wang, Chunwei; Liu, Zijin; Zhai, Yadi; Zhang, Yong; Jiang, Jie; Moriguchi, Nobuhiro; Zhu, Jianzhong; Yamana, Yoshihiro

doi:10.1039/c5ra17934c

Cited by 9 publications

(4 citation statements)

References 34 publications

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“…The rPP exhibited a typical diffraction pattern for PP with signals at 14.4°, 17.2°, 18.8°, 21.7°, and 24.0°, which corresponds to planes of (110), (040), (130), (111)+ (131)+(040), and (060)+(150). These peaks are characteristic for PP α ‐form crystals, and there was no trace ofthe β modification found either in the neat polymer or composites . It could be seen that the peaks shifted to lower diffraction angle, meantime the peak intensity decreased when the matrix was reinforced with 20 wt% ONPF, which implied the formation of intercalation morphology .…”

Section: Resultsmentioning

confidence: 94%

Characteristics of undeinked, alkaline deinked, and neutral deinked old newspaper fibers reinforced recycled polypropylene composites

Zhang

Cong

et al. 2017

Polymer Composites

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The properties of old newspaper fibers (ONPF) reinforced recycled polypropylene (rPP) composites (ONPF/rPP) have been studied. The effect of alkaline and neutral deinking treatments of ONPF was investigated. The tensile and flexural strength of ONPF/rPP composites were significantly improved when compared to the neat rPP. Composites from neutral deinked fibers showed slightly better mechanical strength than that reinforced by alkaline deinked fibers. The effect of the ONPF deinking treatment on the water absorption of the composites was notable. Thermogravimetric analysis revealed that deinked ONPF/rPP composites had lower thermal stability. Differential scanning calorimetry showed deinking treatment reduced the degree of crystallinity of composites as compared to the undeinked composites. X‐ray diffraction was used to characterize the crystallization structures of composites. Scanning electron microscopy micrographs of 20 wt% ONPF/rPP composites showed well fiber dispersion in the matrix. Interfacial adhesion was decreased in the deinked samples due to removal of ink particles. POLYM. COMPOS., 39:3537–3544, 2018. © 2017 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 94%

Characteristics of undeinked, alkaline deinked, and neutral deinked old newspaper fibers reinforced recycled polypropylene composites

Zhang

Cong

et al. 2017

Polymer Composites

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“…The visible light transmittance for RF was over 93% at 400 nm and around 99% at 700 nm, which indicates that 7–1% of the light was absorbed by the film in this spectral range [see Figure (A)]. Literature reports indicated that the materials with similar values of transmittance were cataloged as transparent materials. The low transparency of the NRF is due to proteins, lipids, and other components of the NR.…”

Section: Resultsmentioning

confidence: 99%

Flexible fluorescent films based on quantum dots (QDs) and natural rubber

Danna

Osorio-Román

Dognani

et al. 2017

J of Applied Polymer Sci

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This article presents the fabrication and characterization of polyisoprene fluorescent films doped with CdTe quantum dots (QDs). The biopolymer (polyisoprene) is extracted from natural rubber latex, generating flexible and transparent films in visible range (transmittance over 90%) ideal as a matrix to support QDs. The water solubility of the biopolymer facilitates its doping with water dispersed QDs at room temperature to obtain the fluorescent films. Thermogravimetric analysis reveals that QDs have no significant effect on the thermal properties of the biopolymer. Photophysical characterization of the solution and solid state (films) of the QDs evidenced that the polymer matrix does not influence its emission properties, the maximum fluorescence peaks have only 2 nm of difference between the solution and solid state (films) samples. Therefore, polyisoprene from natural rubber can be considered as an excellent flexible matrix to fabricate fluorescent films with QDs. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45459.

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“…Figure 5 shows the XRD patterns for both pure PP and the samples containing the 5 masterbatches studied. The XRD patterns of all the samples show three strong peaks at 2θ angles of around 14 º (110), 16.8 º (040), 18.4 º (130) and two overlapping peaks at 2θ angles of 21 º (111) and 21.8 º (041) [30][31][32]. The small peak at a 2θ angle of ~ 25.3 º (150, 060) which corresponds to the α-crystallite phase is also observed in all the samples [31].…”

Section: Xrd and Ftir Analysismentioning

confidence: 99%

The effect of masterbatch pigments on the crystallisation, morphology, and shrinkage behaviour of Isotactic Polypropylene

et al. 2022

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Variations in mould shrinkage when using organic and inorganic pigments in semicrystalline polymers is a well-known phenomenon within industry. These differences in mould shrinkage are thought to be caused by the presence of the pigments acting as nucleating agents, altering the crystallisation of semicrystalline polymers. These shrinkage variations can give rise to problems in obtaining the correct interference fit between parts and can cause issues in automated equipment such as filling lines. It has been previously reported that the onset temperature of crystallisation measured via DSC (differential scanning calorimetry) can be used to predict shrinkage when a variety of neat pigments are added to un-nucleated PP (polypropylene). However, the shrinkage and crystallisation behaviour of masterbatch pigments, which are widely used industrially is poorly understood. To better understand the influence of masterbatch pigments on crystallisation and shrinkage behaviour, injection moulded samples were prepared using variety of reds, whites, and purple commercial-masterbatch pigments with PP. The crystallisation kinetics and crystallinity were studied using DSC, LPOM (Linkam hot stage polarising optical microscopy), XRD (X-ray diffraction), and FTIR (Fourier transform infrared spectroscopy). The morphology was investigated via LPOM and SEM (scanning electron microscopy). A clear correlation was observed between the crystallisation onset temperature measured using DSC and the recorded shrinkage. A strong relationship was also observed between the percentage crystallinity measured using FTIR and shrinkage. Quinacridone and pyrrole based red and purple pigments were found to act as strong nucleating agents, with the pyrrole based red pigment also acting as β nucleator in PP. The white pigments were found to have less influence on the nucleation behaviour. For the pigments which induced the largest variation in shrinkage, a higher rate of nucleation and proportionally smaller spherulitic diameter was observed by DSC, SEM, and LPOM.

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Characterization of polypropylene/hydrogenated styrene-isoprene-styrene block copolymer blends and fabrication of micro-pyramids via micro hot embossing of blend thin-films

Abstract: Polypropylene (PP)/hydrogenated styrene-isoprene-styrene block copolymer (HYBRAR) blends were proposed as a new material for the fabrication of optical thin-films with regular micro-pyramids via the micro hot embossing of blend thin-films.

Cited by 9 publications

References 34 publications

Characteristics of undeinked, alkaline deinked, and neutral deinked old newspaper fibers reinforced recycled polypropylene composites

Characteristics of undeinked, alkaline deinked, and neutral deinked old newspaper fibers reinforced recycled polypropylene composites

Flexible fluorescent films based on quantum dots (QDs) and natural rubber

The effect of masterbatch pigments on the crystallisation, morphology, and shrinkage behaviour of Isotactic Polypropylene

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