Direct Reactive Extrusion of PLA in the Presence of a Multifunctional Chain Extender

Yonca Alkan Göksu

Makale detayları

Direct Reactive Extrusion of PLA in the Presence of a Multifunctional Chain Extender

Yazarlar:

Yonca Alkan Göksu

Yayıncı:

Karyay Karadeniz Yayımcılık

Ana Başlıklar:

Polimerler ve Plastikler

Dergi:

Black Sea Journal of Engineering and Science Vol.7 Issue 4, pp.743-751

Belge Tipi:

Makale

Yayın Tarihi:

7/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001318544

pISSN:

2619-8991

Anahtar kelimeler:

Özet:

 The environmental impact of non-renewable, fossil fuel-based polymers has led to growing interest in sustainable alternatives such as Polylactic acid PLA. PLA is biodegradable and suitable for packaging application, however due to limited number of efforts to effectively recycle PLAs, its disposal still contributes to the plastic pollution problem. In general, plastic recycling methods could be categorized into three main groups: i incineration for energy generation, ii chemical recycling, and iii mechanical recycling. Among those strategies, mechanical recycling would be the optimal choice due to its applicability to current plastic production lines. However, limited thermal stability of PLA during melt mixing make its mechanical recycling challenging. This study explores the direct use of ketene-based chain extenders in the melt mixing step without any pre-treatments to enhance PLAs properties during thermal recycling. Those ketene-based chain extenders could increase the molecular weight and hence melt viscosity of PLA by reacting its hydroxyl and carboxylic acid end groups. For this purpose, copolymers of styrene, methyl methacrylate and 2,2,5-trimethyl-5-4-vinylbenzyl-1,3-dioxane-4,6-dione MA were synthesized and directly melt mixed with PLA in micro compounder at 210 C for 3 mins. Force values were monitored simultaneously through this mixing step. Final molecular weights and thermal properties of PLAs were also analyzed through GPC and DSC analyses.

 The environmental impact of non-renewable, fossil fuel-based polymers has led to growing interest in sustainable alternatives such as Polylactic acid PLA. PLA is biodegradable and suitable for packaging application, however due to limited number of efforts to effectively recycle PLAs, its disposal still contributes to the plastic pollution problem. In general, plastic recycling methods could be categorized into three main groups: i incineration for energy generation, ii chemical recycling, and iii mechanical recycling. Among those strategies, mechanical recycling would be the optimal choice due to its applicability to current plastic production lines. However, limited thermal stability of PLA during melt mixing make its mechanical recycling challenging. This study explores the direct use of ketene-based chain extenders in the melt mixing step without any pre-treatments to enhance PLAs properties during thermal recycling. Those ketene-based chain extenders could increase the molecular weight and hence melt viscosity of PLA by reacting its hydroxyl and carboxylic acid end groups. For this purpose, copolymers of styrene, methyl methacrylate and 2,2,5-trimethyl-5-4-vinylbenzyl-1,3-dioxane-4,6-dione MA were synthesized and directly melt mixed with PLA in micro compounder at 210 C for 3 mins. Force values were monitored simultaneously through this mixing step. Final molecular weights and thermal properties of PLAs were also analyzed through GPC and DSC analyses.

 The environmental impact of non-renewable, fossil fuel-based polymers has led to growing interest in sustainable alternatives such as Polylactic acid PLA. PLA is biodegradable and suitable for packaging application, however due to limited number of efforts to effectively recycle PLAs, its disposal still contributes to the plastic pollution problem. In general, plastic recycling methods could be categorized into three main groups: i incineration for energy generation, ii chemical recycling, and iii mechanical recycling. Among those strategies, mechanical recycling would be the optimal choice due to its applicability to current plastic production lines. However, limited thermal stability of PLA during melt mixing make its mechanical recycling challenging. This study explores the direct use of ketene-based chain extenders in the melt mixing step without any pre-treatments to enhance PLAs properties during thermal recycling. Those ketene-based chain extenders could increase the molecular weight and hence melt viscosity of PLA by reacting its hydroxyl and carboxylic acid end groups. For this purpose, copolymers of styrene, methyl methacrylate and 2,2,5-trimethyl-5-4-vinylbenzyl-1,3-dioxane-4,6-dione MA were synthesized and directly melt mixed with PLA in micro compounder at 210 C for 3 mins. Force values were monitored simultaneously through this mixing step. Final molecular weights and thermal properties of PLAs were also analyzed through GPC and DSC analyses.

 The environmental impact of non-renewable, fossil fuel-based polymers has led to growing interest in sustainable alternatives such as Polylactic acid PLA. PLA is biodegradable and suitable for packaging application, however due to limited number of efforts to effectively recycle PLAs, its disposal still contributes to the plastic pollution problem. In general, plastic recycling methods could be categorized into three main groups: i incineration for energy generation, ii chemical recycling, and iii mechanical recycling. Among those strategies, mechanical recycling would be the optimal choice due to its applicability to current plastic production lines. However, limited thermal stability of PLA during melt mixing make its mechanical recycling challenging. This study explores the direct use of ketene-based chain extenders in the melt mixing step without any pre-treatments to enhance PLAs properties during thermal recycling. Those ketene-based chain extenders could increase the molecular weight and hence melt viscosity of PLA by reacting its hydroxyl and carboxylic acid end groups. For this purpose, copolymers of styrene, methyl methacrylate and 2,2,5-trimethyl-5-4-vinylbenzyl-1,3-dioxane-4,6-dione MA were synthesized and directly melt mixed with PLA in micro compounder at 210 C for 3 mins. Force values were monitored simultaneously through this mixing step. Final molecular weights and thermal properties of PLAs were also analyzed through GPC and DSC analyses.

Makale detayları

Direct Reactive Extrusion of PLA in the Presence of a Multifunctional Chain Extender

Yazarlar:

Yonca Alkan Göksu

Yayıncı:

Karyay Karadeniz Yayımcılık

Ana Başlıklar:

Polimerler ve Plastikler

Dergi:

Black Sea Journal of Engineering and Science Vol.7 Issue 4, pp.743-751

Belge Tipi:

Makale

Yayın Tarihi:

7/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001318544

pISSN:

2619-8991

Poly(lactic acid)

Ketenes

Meldrum’s acid

Chain extender

Direct melt mixingPoly(lactic acid)

Ketenes

Meldrum’s acid

Chain extender

Direct melt mixing

Sayı

Makale detayları

Yazarlar: Yonca Alkan Göksu

Yayıncı: Karyay Karadeniz Yayımcılık

Ana Başlıklar: Polimerler ve Plastikler

Dergi: Black Sea Journal of Engineering and Science Vol.7 Issue 4, pp.743-751

Belge Tipi: Makale

Yayın Tarihi: 7/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001318544

pISSN: 2619-8991

Sayı

Yazarlar:

Yonca Alkan Göksu

Yayıncı:

Karyay Karadeniz Yayımcılık

Ana Başlıklar:

Polimerler ve Plastikler

Dergi:

Black Sea Journal of Engineering and Science Vol.7 Issue 4, pp.743-751

Belge Tipi:

Makale

Yayın Tarihi:

7/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001318544

pISSN:

2619-8991