Process of grafting styrene onto LLDPE by swelling and suspension copolymerization

Yan, Jing; Miao, Xiaojie; Cui, Xuejun; Jin, Weiqun; Liang, Hongru; Li, Junfeng; Wang, Hongyan

doi:10.1002/pen.21692

Cited by 5 publications

(5 citation statements)

References 33 publications

(40 reference statements)

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“…The break elongation increased about 30 times after addition of 8% LLDPE and 10 mL/g of cyclohexane compared with that of PS. However, the breaking power, tensile strength, and breaking strength decreased with increased cyclohexane compatibilizer . Therefore, the right amount of cyclohexane as compatibilizer could increase the grafting efficiency and improve the toughness of PS.…”

Section: Resultsmentioning

confidence: 94%

Preparation and characterization of grafting styrene onto LLDPE by cyclohexane compatibilization in suspension polymerization

Meng

Zhang²,

Wang

et al. 2014

J of Applied Polymer Sci

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A novel method of grafting styrene onto linear low-density polyethylene (LLDPE) by suspension polymerization was systematically evaluated. Cyclohexane as a compatibilizer was introduced to swell and activate the surface of LLDPE molecular chain for amplifying the contact point of styrene monomer with LLDPE. A series of copolymer of grafting polystyrene (PS) onto LLDPE, known as LLDPE-g-PS, were prepared with different ratios of cyclohexane/styrene monomer and various LLDPE dosages. FTIR and 1 H NMR techniques both confirmed successful PS grafting onto the LLDPE chains. In addition, SEM images of LLDPE-g-PS particles showed that the cross-section morphology becomes smooth and dense with suitable cyclohexane dosages, indicating a better compatibility between LLDPE and PS. The highest grafting efficiency was 28.4% at 10 mL/g cyclohexane and styrene monomer when 8% LLDPE was added. In these conditions, the LLDPE-g-PS elongation at break increased by about 30 times compared with PS. Moreover, thermal gravimetric analysis (TGA) demonstrated that LLDPE-g-PS possesses much higher thermal stability than pure PS. Therefore, the optimal amount of cyclohexane as compatibilizer could increase the grafting efficiency and improve the toughness of PS.

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Section: Resultsmentioning

confidence: 94%

Preparation and characterization of grafting styrene onto LLDPE by cyclohexane compatibilization in suspension polymerization

Meng

Zhang²,

Wang

et al. 2014

J of Applied Polymer Sci

Self Cite

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“…The polymer product was initially dried in an air recirculation oven at 60 °C for 4 h and finally dried in a vacuum oven for 24 h at room temperature. For polymer characterization of PS/PMMA blends, the literature usually recommends the solvent separation of the PS and PMMA phases . Solvent extraction was not performed here because of the low PMMA contents of the resins, which lead to low yields and purity of recovered PMMA fractions.…”

Section: Methodsmentioning

confidence: 99%

In-Situ Incorporation of Poly(methyl methacrylate) in Suspension Styrene Polymerizations

Castor

Nele

Pinto

2014

Macromol. React. Eng.

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Blends of poly(styrene)/poly(methyl methacrylate) (PS/PMMA) are produced in situ during suspension polymerizations of styrene performed in the presence of PMMA. The effects caused by the in situ incorporation of PMMA on the kinetic behavior of the reaction and on the molar mass distributions (MMD) and particle size distributions (PSD) of the obtained PS/PMMA polymer particles are evaluated. It is shown that the PMMA content can lead to significant changes of the initial viscosity of the reaction medium, also leading to significant changes of styrene conversions during the reaction course. Besides, addition of PMMA can cause an increase of the average molar masses and average particles sizes of the obtained polymer beads, also leading to broadening of the MMD and PSD of the final resin.

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“…In addition, the viscosity of this system was severely high, leading to instability of the polymerization system (3,15). Previous studies reported that ethylenestyrene interpolymer (ESI) could toughen PS and improve the compatibility of PS and PE or polypropylene (PP) (16)(17)(18). However, the catalyst used for the preparation of ESI was expensive.…”

Section: Introductionmentioning

confidence: 99%

“…The combination of PS and PE via in situ grafting polymerization to improve the properties of PS/PE blends has attracted much attention. However, only a few studies proposed this process for preparing LDPE/PS interpolymer resin particles in suspension polymerization (2,16).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of LDPE/PS interpolymer resin particles through a swelling suspension polymerization approach

et al. 2020

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AbstractA facile method to prepare low-density polyethylene (LDPE)/polystyrene (PS) interpolymer resin particles by swelling suspension polymerization without addition of extra swelling agent was developed. The polymerization temperature, polymerization time, and initiator concentration were investigated. Fourier transform infrared spectroscopy analysis confirmed that the LDPE/PS interpolymer resin particles were successfully prepared and a small amount of PS-g-LDPE existed in the resin. Scanning electron microscopy revealed that PS was uniformly distributed in the LDPE matrix, indicating excellent compatibility between PS and LDPE. The mechanical properties of LDPE/PS interpolymer resin were intermediate between PS and LDPE polymers.

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Process of grafting styrene onto LLDPE by swelling and suspension copolymerization

Cited by 5 publications

References 33 publications

Preparation and characterization of grafting styrene onto LLDPE by cyclohexane compatibilization in suspension polymerization

Preparation and characterization of grafting styrene onto LLDPE by cyclohexane compatibilization in suspension polymerization

In-Situ Incorporation of Poly(methyl methacrylate) in Suspension Styrene Polymerizations

Fabrication of LDPE/PS interpolymer resin particles through a swelling suspension polymerization approach

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