Effect of Melt Temperature and Hold Pressure on the Weld-Line Strength of an Injection Molded Talc-Filled Polypropylene

Zhou, Yuanxin; Mallick, P. K.

doi:10.1155/2014/846962

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…On the other hand, a reduction in strength retention of PA10T/X was a result of high temperature at meld line interface due to higher shear heating at short injection time. According to the reports, a higher melt temperature supports the diffusion of molecular chain and leads to a higher degree of surface bonding at weld line interface [10,15]. Fig.…”

Section: Resultsmentioning

confidence: 94%

Effect of Weld Line Formation on Morphology and Mechanical Properties for 3D-MID Technology

Chuaping¹,

Mann²,

Dangtungee

et al. 2015

KEM

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The topic of this research work was to demonstrate the feasibility of a 3D-MID concept using injection molding technique and investigate the effects of two weld line types on the structure and mechanical properties such as tensile, flexural strength and morphology. In order to obtain more understanding of the bonds between polymer and metals, two different polymer bases of polyphthalamide (PPA) with the same type and amount of filler content were produced by injection molding at the different processing conditions. A mold was designed in such a way that weld and meld line can be produced with different angles by changing as insert inside of the mold. The mechanical properties such as stiffness, tensile strength and flexural strength were determined in tensile and flexural tests, respectively. The results showed in line with the expectation of high reduction on mechanical properties in area where weld/meld lines occurred. The result of tensile test was clearly seen that weld and meld line showed a considerable influence on mechanical properties. The reduction in tensile strength was approximately 58% according to weld line types, whereas in flexural strength was approximately 62%. On the other hand, the effect of the injection times and mold temperatures on the tensile strength were marginal.

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Section: Resultsmentioning

confidence: 94%

Effect of Weld Line Formation on Morphology and Mechanical Properties for 3D-MID Technology

Chuaping¹,

Mann²,

Dangtungee

et al. 2015

KEM

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show abstract

“…But when M0 was melted at 250 o C, the failure mode of all test specimen was 'Fracture' and occurred at lower exural properties than the others. This might be resulted from the thermal degradation of the polymers when fabricating at high temperature causing polymer more brittle 22 .…”

Section: Discussionmentioning

confidence: 99%

Development of poly(methyl methacrylate)/poly(lactic acid) blend as sustainable biopolymer for dental applications (Running Title) PMMA/PLA blend as biopolymer for dental applications

Charasseangpaisarn,

Wiwatwarrapan,

Thunyakitpisal

et al. 2023

Preprint

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Poly(lactic acid) (PLA) is gaining popularity in manufacturing due to environmental concerns. When comparing to poly(methyl methacrylate) (PMMA), PLA exhibits low thermal properties. To enhance the properties of these polymers, a PMMA/PLA blend has been introduced. This study aimed to investigate the optimal ratio of PMMA/PLA blends for potential dental applications based on their mechanical properties, physical properties, and biocompatibility. The PMMA/PLA blends were manufactured by melting and mixing using twin screw extruder and prepared into thermoplastic polymer beads. The specimens of neat PMMA (M100), three different ratios of PMMA/PLA blends (M75, M50, and M25), and neat PLA (M0) were fabricated with injection molding technique. The neat polymers and polymer blends were investigated in terms of flexural properties, glass transition temperature (Tg), miscibility, residual monomer, water sorption, water solubility, degradation, and biocompatibility. The data was statistically analyzed. The results indicated that Tg of PMMA/PLA blends improved with increasing PMMA content. PMMA/PLA blends were miscible in all composition ratios. The flexural properties of polymer blends were superior to those of neat PMMA and neat PLA. The biocompatibility was not different among different composition ratios. Additionally, the other parameters of PMMA/PLA blends were improved as the PMMA ratio decreased. Thus, the optimum ratio of PMMA/PLA blends have the potential to serve as novel sustainable biopolymer for extensive dental applications.

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“…But when M0 was melted at 250 °C, the failure mode of all test specimen was ‘Fracture’ and occurred at lower flexural properties than the others. This might be resulted from the thermal degradation of the polymers when fabricating at high temperature causing polymer more brittle 26 .…”

Section: Discussionmentioning

confidence: 99%

Development of poly(methyl methacrylate)/poly(lactic acid) blend as sustainable biomaterial for dental applications

Charasseangpaisarn,

Wiwatwarrapan,

Thunyakitpisal

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Poly(lactic acid) (PLA) is gaining popularity in manufacturing due to environmental concerns. When comparing to poly(methyl methacrylate) (PMMA), PLA exhibits low melting and glass transition temperature (Tg). To enhance the properties of these polymers, a PMMA/PLA blend has been introduced. This study aimed to investigate the optimal ratio of PMMA/PLA blends for potential dental applications based on their mechanical properties, physical properties, and biocompatibility. The PMMA/PLA blends were manufactured by melting and mixing using twin screw extruder and prepared into thermoplastic polymer beads. The specimens of neat PMMA (M100), three different ratios of PMMA/PLA blends (M75, M50, and M25), and neat PLA (M0) were fabricated with injection molding technique. The neat polymers and polymer blends were investigated in terms of flexural properties, Tg, miscibility, residual monomer, water sorption, water solubility, degradation, and biocompatibility. The data was statistically analyzed. The results indicated that Tg of PMMA/PLA blends was increased with increasing PMMA content. PMMA/PLA blends were miscible in all composition ratios. The flexural properties of polymer blends were superior to those of neat PMMA and neat PLA. The biocompatibility was not different among different composition ratios. Additionally, the other parameters of PMMA/PLA blends were improved as the PMMA ratio decreased. Thus, the optimum ratio of PMMA/PLA blends have the potential to serve as novel sustainable biomaterial for extensive dental applications.

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Effect of Melt Temperature and Hold Pressure on the Weld-Line Strength of an Injection Molded Talc-Filled Polypropylene

Cited by 7 publications

References 12 publications

Effect of Weld Line Formation on Morphology and Mechanical Properties for 3D-MID Technology

Effect of Weld Line Formation on Morphology and Mechanical Properties for 3D-MID Technology

Development of poly(methyl methacrylate)/poly(lactic acid) blend as sustainable biopolymer for dental applications (Running Title) PMMA/PLA blend as biopolymer for dental applications

Development of poly(methyl methacrylate)/poly(lactic acid) blend as sustainable biomaterial for dental applications

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