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Järvelä, Sanna

doi:10.1023/a:1003257430162

Cited by 16 publications

(1 citation statement)

References 38 publications

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“…In another approach a family of rubber-toughened, mica filled PP composites was developed by using EPDM as an impact modifier (21). A recent work in this area was done by using PP/PVB/Mica systems, PVB being the modifier, which encapsulates the mica particles (22).…”

Section: Introductionmentioning

confidence: 99%

Interface modification and characterization in three‐component polymer blends

et al. 2000

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The effect of interface characteristics on the properties of three-component polymer blends comprising PP/EVOH/mica and PP/EVOH/glass beads (GB) was investigated (polypropylene-PP, ethylene-vinylalcohol-EVOH). The systems selected are based on the binary PP/EVOH immiscible blend representing a semi-crystalline apolar polymer (PP) and a semi-crystalline highly polar copolymer (EVOH), where PP serves as the matrix. A series of the binary and three-component blends with varying compositions was chosen to study the effect of the molding procedure, i.e. compression versus injection molding. The structures observed by SEM analysis consisted of the filler particles engulfed by the EVOH phase, with some of the minor EVOH component dispersed within the PP matrix. The effects of silane treatment (GB/EVOH interface) and compatibilization, using a maleated-PP compatibilizer (PP/EVOH interface), were studied in relation to the generated structures and properties. The compatibilizer was added in a unique procedure by which the encapsulated GB/EVOH structures were preserved. The characterization methods used included morphology by Scanning Electron Microscopy, thermal properties and crystallization behavior by Differential Scanning Calorimetry, mechanical properties by tensile testing, and dynamic characteristics by Dynamic Mechanical Thermal Analysis. The work has shown that structure-performance relationships in the three-component blends can be varied and controlled. P prising three and more component systems (polymers and fillers). A major characteristic of immiscible (phase separated) polymer blends is the multi-phase morphology, and its formation sensitivity to the processing conditions. Polymer blends offer an effective 'Moshe Narkis dedicates this article with best wishes to Tony DiBenedetto. a good friend with whom he has had fruitful collaboration since 1969. static and dynamic mechanical properties of the resulting products. Incorporation of a filler to a binary immiscible polymer system can lead to several morphologies: the filler particles may disperse in the matrix along with the minor dispersed polymer phase, the filler may latcate at the interfaces between the matrix and the dispersed polymer phase, the filler may be encapsulated by the minor phase. Immiscible blend systems exhibiting filler encapsulation are PP/PA-6 blends filled with 476

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Section: Introductionmentioning

confidence: 99%

Interface modification and characterization in three‐component polymer blends

et al. 2000

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The impact of modeling technology integration on pre-service teachers’ technology confidence

Adamy

Boulmetis

2006

J. Comput. High. Educ.

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THIS ARTICLE DESCRIBES the PT3 Implementation Grant at the University of Rhode Island's School of Education and the impact it had on students' confidence in using technology for teaching. The three-year project focused on working with faculty from the School of Education and the College of Arts and Sciences to integrate technology into their instruction and improve the supervision of pre-service teachers. The goal was to provide exemplary models of pedagogically sound technology use that were embedded in core teacher education courses, and not through a stand-alone "technology for teachers" course. A technology confidence survey was administered to students in the teacher education program at the end of each semester of the three-year project. Data from the survey were analyzed to look at change in attitudes over time as students progressed through the teacher education program. Results show a significant increase in students' confidence in six areas of technology use in teaching, the majority of which were a focus of the project's training and support of university instructors.

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Quality of parental support and students’ emotions during homework: Moderating effects of students’ motivational orientations

Knollmann

Wild

2007

Eur J Psychol Educ

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Cited by 16 publications

References 38 publications

Interface modification and characterization in three‐component polymer blends

Interface modification and characterization in three‐component polymer blends

The impact of modeling technology integration on pre-service teachers’ technology confidence

Quality of parental support and students’ emotions during homework: Moderating effects of students’ motivational orientations

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