Structure and Properties of Isotactic Polypropylene/Polybutene-1 In-reactor Alloys

Ma, Yufeng; Zhang, Ning; Zheng, Wenjie; He, Aihua; Liu, Chenguang

doi:10.1007/s10118-020-2468-9

Cited by 12 publications

(4 citation statements)

References 47 publications

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“…In this regard, low density polyethylene (LDPE) with a melting temperature of around 110 °C and heat triggered SME is a candidate for promoting the deformation temperature of EUG-based SMMs via polymer blending. 21,22 Besides, based on our experience, incorporation of zinc methacrylate (ZDMA) fillers would help promote the mechanical performance of EUG SMMs; they have been widely used in polymer-based SMMs and selfhealing materials to improve their shape memory 12,20,23,24 and self-healing properties. 25,26 Another advantage of ionic ZDMA lies in the fact that not only covalent crosslinks but also reversible ionic-based crosslinks can be formed in ZDMA reinforced SMPs.…”

Section: Introductionmentioning

confidence: 99%

Bio‐based Eucommia ulmoides gum/low density polyethylene shape memory composites reinforced by zinc methacrylate

Pei

Xia

Zhang

et al. 2021

Polymer International

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In this paper, we present an efficient and green extraction process for Eucommia ulmoides gum (EUG) to solve the tricky problems in separation and precipitation, providing a new idea for the industrialization of EUG extraction. Subsequently, the obtained EUG was blended with low density polyethylene (LDPE) and zinc methacrylate (ZDMA) to fabricate novel shape memory composites with both covalent and ionic crosslinking networks. It was found that the improvement in mechanical performance and enhancement in shape recovery ability of the EUG/LDPE/ZDMA composites was attributable to the Zn 2+ -based ionic crosslinks. The EUG/LDPE/ZDMA shape memory composites could be candidates in the production of medical fixing materials, hot-shrinkable tubes and packaging products.

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Section: Introductionmentioning

confidence: 99%

Bio‐based Eucommia ulmoides gum/low density polyethylene shape memory composites reinforced by zinc methacrylate

Pei

Xia

Zhang

et al. 2021

Polymer International

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“…PB pipeline can be used for a long time at 80-150 C without deformation. 4,5 The characteristics of smooth wall, no scaling and low noise also make PB pipe friendly to the ecological environment. 6 Therefore, the use of PB as a hot water pipe has advantages over traditional polyolefin.…”

Section: Introductionmentioning

confidence: 99%

“…PB pipeline can be used for a long time at 80–150°C without deformation 4,5 . The characteristics of smooth wall, no scaling and low noise also make PB pipe friendly to the ecological environment 6 .…”

Section: Introductionmentioning

confidence: 99%

Study on interfacial compatibilizing effect of PB grafts on PB/GNP thermally conductive composites

Yan,

Wen

2024

Polymer Composites

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Using polymer‐grafts to improve the interfacial compatibilization of composites is by far the most common and effective strategy. However, although polybutene‐1 (PB) resin enjoys the reputation of “gold plastic” in the field of industry, there are few studies on its grafting and functional modification. In this work, PB‐grafts were prepared by melt grafting method with maleic anhydride (MAH) and styrene (St) as the functional monomers. The effect of two PB‐grafts (PB‐g‐MAH and PB‐g‐MAH‐co‐St) on the interfacial compatibilization of PB/GNP (Graphene nanosheet) thermally conductive composites was compared and the corresponding compatibilizing mechanism is discussed. Results indicate that PB‐g‐MAH‐co‐St has better compatibizing effect than that of PB‐g‐MAH because the cooperation of St with MAH enhanced the grafting degree of functional monomers on PB, and increased the surface energy of PB‐g‐MAH‐co‐St, which reduced the interface energy between PB and GNP and improved its interfacial adhesion. A better compatibilization effect has achieved when the compatibilizer and filler at the mass ratio of 1:4. Under this ratio, when the content of GNP is 30 wt%, the thermal conductivity and electrical conductivity of PB/GNP/ PB‐g‐MAH‐co‐St composite achieved 1.82 W·m−1·K−1 and 8.44 × 10−8 S·cm−1, which are 857.89% and 9 orders of magnitude higher than that of neat PB, respectively. Moreover, the composite has good mechanical properties and processability, which is beneficial to industrialization.Highlights PB‐g‐MAH‐co‐St has higher grafting ratio than that of PB‐g‐MAH. The surface energy of PB/GNP composites is reduced by use of PB‐g‐MAH‐co‐St. There is a suitable mass ratio between compatibilizer and filler. The composite of PB/GNP/PB‐g‐MAH‐co‐St achieved high thermal conductivity. The PB/GNP/PB‐g‐MAH‐co‐St composites have good melting processability.

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“…This crystal transition refers to a change in helical conformation, resulting in an approximate 14% increase in the chain molecule length and a 10% decrease in the cross-sectional area. 7 A complete transition normally requires several weeks at room temperature, [8][9][10][11][12] which seriously affects the market circulation of products. For this reason, several methods have been proposed to accelerate the transition from form II to I, [13][14][15][16] of which stretching has been identified as a practical method.…”

Section: Introductionmentioning

confidence: 99%

Stretching‐induced changes in the crystal structure of isotactic polybutene‐1: Temperature and stretching speed dependence

Wen

Yue

Liu

et al. 2022

Polymers for Advanced Techs

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To better understand the two synchronous processes of lamella orientation and crystal transition of iPB‐1 during stretching, the stretching‐induced changes in the crystal structure of iPB‐1 were investigated at different temperatures (room temperature, 65, and 85°C) and stretching speeds (5, 10, and 20 μm/s). It was discovered that the acceleration of crystal transition occurred almost simultaneously with strain‐hardening, and that lamella orientation and crystal transition made a different response to the stretching speeds and temperatures. This is attributed to two modes of energy dissipation: (1) the motion and orientation of the lamellae; and (2) the lattice displacement within the individual lamellae, resulting in the crystal transition from form II to I. At high temperatures, the reduced resistance to motion makes the lamellae more inclined to move in the amorphous phase in the stretching direction, which caused a high orientation of the lamellae but a retardation of the crystal transition. When iPB‐1 was stretched at a fast speed, the tie molecules failed to immediately transfer sufficient stress to the individual lamellae to induce the helix displacement of the lattice; thus, the orientation of the lamellae was a dominant trait. As a result, both a rapid crystal transition and a high yield of crystal form I were achieved when iPB‐1 was stretched at a slow speed at room temperature.

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Structure and Properties of Isotactic Polypropylene/Polybutene-1 In-reactor Alloys

Cited by 12 publications

References 47 publications

Bio‐based Eucommia ulmoides gum/low density polyethylene shape memory composites reinforced by zinc methacrylate

Bio‐based Eucommia ulmoides gum/low density polyethylene shape memory composites reinforced by zinc methacrylate

Study on interfacial compatibilizing effect of PB grafts on PB/GNP thermally conductive composites

Stretching‐induced changes in the crystal structure of isotactic polybutene‐1: Temperature and stretching speed dependence

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