Polymer blend compatibilization by the addition of block copolymers

Spontak, Richard J.; Ryan, J. J.

doi:10.1016/b978-0-12-816006-0.00003-7

Cited by 18 publications

(15 citation statements)

References 101 publications

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“…A method for the improvement of interfacial adhesion between two phases and thereof mechanical properties of immiscible blends by the addition of proper pre-made block or random copolymer is known as compatibilization [8]. This pre-made block or random copolymer as a compatibilizer has a molecular architecture with miscible chains to both polymer blend components, which adhere two polymers together at the interface boundary like a bridge with interfacial entanglements.…”

Section: Introductionmentioning

confidence: 99%

Choosing an Effective Compatibilizer for a Virgin HDPE Rich-HDPE/PP Model Blend

2021

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The most widely used commodity polymers in the rigid packaging industry are polypropylene (PP) and high-density polyethylene (HDPE). For example, blow molding grade of HDPE as a bottle and injection molding grade of PP as a cap are often used to produce detergent bottles. Therefore, the recycled HDPE bottles from post-consumer waste include PP as a contaminant originated from PP bottle caps. To simulate mechanical recycling of bottle waste, the mechanical properties of HDPE-rich-HDPE/PP virgin model blend were studied. For compatibilization, ethylene-based olefin block copolymer, propylene-based olefin block copolymer, ethylene propylene random copolymer, and styrene-butadiene-styrene triblock copolymer were chosen as potential compatibilizer candidates. Contact angle measurements, morphological analysis, adhesion tests of compatibilizer candidates to polymer blend components and the tensile as well as tensile impact properties of the ternary blends were studied. It was found that the ethylene-based olefin block copolymer was the most effective compatibilizer resulting in a return of mechanical properties to those of neat vHDPE due to its ability to encapsulate dispersed vPP particles in a vHDPE matrix (core-shell morphology) and the best adhesion to polymer blend components.

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Section: Introductionmentioning

confidence: 99%

Choosing an Effective Compatibilizer for a Virgin HDPE Rich-HDPE/PP Model Blend

2021

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“…However, not all thermo-responsive polymers are easily employed for 3D printing. Some natural polymers need to be modified or blended with other polymers in order to acquire the rheological and mechanical specifications [ 106 , 107 ]. Biomaterials need to fulfill the requirements of printability, mechanical strength, and degradation behavior to be subjected to this tissue engineering technique.…”

Section: Bioengineered Thermo-responsive Scaffoldsmentioning

confidence: 99%

Exploration of Bioengineered Scaffolds Composed of Thermo-Responsive Polymers for Drug Delivery in Wound Healing

Henríquez

Castro-Alpízar

Lopretti-Correa

et al. 2021

IJMS

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Innate and adaptive immune responses lead to wound healing by regulating a complex series of events promoting cellular cross-talk. An inflammatory response is presented with its characteristic clinical symptoms: heat, pain, redness, and swelling. Some smart thermo-responsive polymers like chitosan, polyvinylpyrrolidone, alginate, and poly(ε-caprolactone) can be used to create biocompatible and biodegradable scaffolds. These processed thermo-responsive biomaterials possess 3D architectures similar to human structures, providing physical support for cell growth and tissue regeneration. Furthermore, these structures are used as novel drug delivery systems. Locally heated tumors above the polymer lower the critical solution temperature and can induce its conversion into a hydrophobic form by an entropy-driven process, enhancing drug release. When the thermal stimulus is gone, drug release is reduced due to the swelling of the material. As a result, these systems can contribute to the wound healing process in accelerating tissue healing, avoiding large scar tissue, regulating the inflammatory response, and protecting from bacterial infections. This paper integrates the relevant reported contributions of bioengineered scaffolds composed of smart thermo-responsive polymers for drug delivery applications in wound healing. Therefore, we present a comprehensive review that aims to demonstrate these systems’ capacity to provide spatially and temporally controlled release strategies for one or more drugs used in wound healing. In this sense, the novel manufacturing techniques of 3D printing and electrospinning are explored for the tuning of their physicochemical properties to adjust therapies according to patient convenience and reduce drug toxicity and side effects.

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“…However, not all thermo-responsive polymers are easily employed for 3D-printing. Some natural polymers need to be modified or blended with other polymers in order to adquire the rheological and mechanical specifications [93,94]. Biomaterials need to fulfill the requirements of printability, mechanical strength, and degradation behavior to be subjected to this tissue engineering technique.…”

Section: D-printingmentioning

confidence: 99%

Bioengineered Scaffolds for Thermo-responsive Drug Delivery in Wound Healing

Henríquez¹,

Castro-Alpízar²,

Lopretti-Correa³

et al. 2020

Preprint

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innate and adaptive immune responses lead to wound healing by regulating a complex series of events promoting cellular cross-talk. An inflammatory response is presented with its characteristic clinical symptoms: heat, pain, redness, and swelling. Some smart thermo-responsive polymers like chitosan can be used to create biocompatible and biodegradable scaffolds with 3D architectures similar to human structures, allowing their efficient and safe use as tissue engineering and drug delivery systems in chronic wounds. Locally heated tumors above polymer lower critical solution temperature can induce its conversion into a hydrophobic form, enhancing drug release until the thermal stimulus is gone, where a lower release is due to the swelling of the material. This paper integrates the relevant reported contributions of bioengineered scaffolds for thermo-responsive drug delivery in wound healing. Therefore, we present a comprehensive review that aims to demonstrate the capacity of these systems to provide spatially and temporally controlled release strategies for one or more drugs used in wound healing. In this sense, the novel manufacturing techniques of 3D-printing and electrospinning are explored for the tuning of their physicochemical properties to adjust therapies according to the patient’s convenience, as well as reduce drug toxicity and side effects.

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Polymer blend compatibilization by the addition of block copolymers

Cited by 18 publications

References 101 publications

Choosing an Effective Compatibilizer for a Virgin HDPE Rich-HDPE/PP Model Blend

Choosing an Effective Compatibilizer for a Virgin HDPE Rich-HDPE/PP Model Blend

Exploration of Bioengineered Scaffolds Composed of Thermo-Responsive Polymers for Drug Delivery in Wound Healing

Bioengineered Scaffolds for Thermo-responsive Drug Delivery in Wound Healing

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