WO2022260613A1 - Procédé de production de polylactite présentant une aptitude au traitement efficace - Google Patents

Procédé de production de polylactite présentant une aptitude au traitement efficace Download PDF

Info

Publication number
WO2022260613A1
WO2022260613A1 PCT/TR2021/050568 TR2021050568W WO2022260613A1 WO 2022260613 A1 WO2022260613 A1 WO 2022260613A1 TR 2021050568 W TR2021050568 W TR 2021050568W WO 2022260613 A1 WO2022260613 A1 WO 2022260613A1
Authority
WO
WIPO (PCT)
Prior art keywords
pla
production method
polylactic acid
semi
amorphous
Prior art date
Application number
PCT/TR2021/050568
Other languages
English (en)
Inventor
Mohammadreza NOFAR
Pierre J CARREAU
Original Assignee
İzmi̇r Eği̇ti̇m Sağlik Sanayi̇ Yatirim A.Ş.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by İzmi̇r Eği̇ti̇m Sağlik Sanayi̇ Yatirim A.Ş. filed Critical İzmi̇r Eği̇ti̇m Sağlik Sanayi̇ Yatirim A.Ş.
Priority to PCT/TR2021/050568 priority Critical patent/WO2022260613A1/fr
Publication of WO2022260613A1 publication Critical patent/WO2022260613A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
    • C08G63/08—Lactones or lactides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones

Definitions

  • the invention is related to a method of polylactic acid production method wherein visco elastic properties and processability of amorphous polylactic acid (PLA) strengthened by semi-crystalline polylactic acid (PLA).
  • PLA amorphous polylactic acid
  • PLA semi-crystalline polylactic acid
  • Polylactic acid (PLA) biopolymer plays an important role in realisation of sustainability policies due to its production by use of renewable resources.
  • Polylactic acid (PLA) biopolymer is produced by polymerisation of lactic acid which is derived from fermentation of sugar sourced mostly from vegetal sources.
  • PLA is the closest polymer to conventional plastic raw materials in regards of price. Therefore it has found a broad scope of use in recent years. However, it is mostly used as the main component of various mixtures due to various factors, particularly its fragility and its low impact resistance and the difficulty of processing this material in conventional plastic processing machinery.
  • Processability and formability of PLA is limited due to its low visco-elastic and rheological properties. Due to its limited processability processers face larger costs and processing takes longer.
  • US patent document numbered US2010098928 in the current state of the art discloses a polymer mixture comprising polylactic acid.
  • JP2019507827 in the current state of the art discloses a PLA based film and a layer placed on this film.
  • JP2018502957 in the current state of the art discloses a compound and film comprising polylactic acid polymer, polyvinyl acetate polymer and plasticiser.
  • the purpose of this invention is to realise a polylactic acid production method which increases product efficiency by providing better processability of polylactic acid.
  • Another purpose of this invention is to realise a polylactic acid production method which provides higher visco-elastic structure.
  • the production method subject to the invention comprises the steps of;
  • the dry blend of amorphous PLA and semi-crystalline PLA being fed by a twin screwed extruder (TSE) at 160°C and in the 20 to 500 rpm range; - Pelleting of milled or milled extruded filaments; and
  • mixtures comprising 95% amorphous polylactic acid (PLA) by weight and mixtures with three different levels of semi-crystalline PLA with differing crystallisability at 5% by weight were separately prepared by use of a twin screw extruder.
  • the filaments output from the extruder were milled at approximately level 10 milling rate, and then they were directly pelleted or formed into pellets.
  • SAOS small amplitude oscillation stop
  • Unscratched samples have displayed a net-like action under lower frequencies by addition of semi-crystalline PLA potentially strengthening amorphous PLA by presence of crystal clusters. This behaviour changes when PLAs with higher crystallisation or with higher crystal melting peaks. However, samples milled together have displayed a more distinct net- like behaviour due to oriented crystals which strengthen the amorphous matrix with a fibre like crystal net. It is seen that crystallisation develops as a result of cold crystallisation which further increases visco-elastic action of amorphous PLA in rheological tests. Formation of fibre-like crystals in the milled unformed PLA was confirmed by stress growth tests where the primary stage caused by deformation of the fibre-like crystals can reoccur after molecular relaxation, while this stage is not observed in non-milled samples.
  • visco-elastic improvements provide an easy path for further improvement of visco-elastic properties and processability of amorphous PLA. This will become possible by development of an innovative amorphous PLA system which becomes extremely processable by formation of a regular, fibre-like crystal net.
  • clusters or fibre-like structures of semi crystalline PLA can be produced in the amorphous PLA structure without being melted and without creating a homogenous melt structure of both PLAs.
  • Formation of crystal clusters and fibre-like crystal net and subsequent increase in visco-elastic action of the developed PLA are controlled by rheological tests, differential scan calorimetry and x-ray diffractometer. Rheological tests show that visco-elastic action of the developed PLA display a significant improvement depending on formation of the crystal clusters and more particularly the fibre-like crystal network.

Abstract

L'invention concerne un procédé de production d'acide polylactique, dans lequel des propriétés viscoélastiques et une aptitude au traitement d'acide polylactique (PLA) amorphe sont renforcées par l'acide polylactique (PLA) semi-cristallin.
PCT/TR2021/050568 2021-06-10 2021-06-10 Procédé de production de polylactite présentant une aptitude au traitement efficace WO2022260613A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/TR2021/050568 WO2022260613A1 (fr) 2021-06-10 2021-06-10 Procédé de production de polylactite présentant une aptitude au traitement efficace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2021/050568 WO2022260613A1 (fr) 2021-06-10 2021-06-10 Procédé de production de polylactite présentant une aptitude au traitement efficace

Publications (1)

Publication Number Publication Date
WO2022260613A1 true WO2022260613A1 (fr) 2022-12-15

Family

ID=84425177

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2021/050568 WO2022260613A1 (fr) 2021-06-10 2021-06-10 Procédé de production de polylactite présentant une aptitude au traitement efficace

Country Status (1)

Country Link
WO (1) WO2022260613A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004033539A1 (fr) * 2002-10-11 2004-04-22 University Of Connecticut Melanges de polymeres amorphes et semicristallins possedant des proprietes de memoire de forme
AU2019100618A4 (en) * 2019-05-28 2019-07-11 Kingfa Sci Tech Co Ltd Polylactic acid composite material and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004033539A1 (fr) * 2002-10-11 2004-04-22 University Of Connecticut Melanges de polymeres amorphes et semicristallins possedant des proprietes de memoire de forme
AU2019100618A4 (en) * 2019-05-28 2019-07-11 Kingfa Sci Tech Co Ltd Polylactic acid composite material and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GAO CHENGCHENG, BAO XIANYANG, YU LONG, LIU HONGSHENG, SIMON GEORGE P., CHEN LING, LIU XINGXUN: "Thermal properties and miscibility of semi-crystalline and amorphous PLA blends", JOURNAL OF APPLIED POLYMER SCIENCE, JOHN WILEY & SONS, INC., US, vol. 131, no. 23, 5 December 2014 (2014-12-05), US , XP093016572, ISSN: 0021-8995, DOI: 10.1002/app.41205 *

Similar Documents

Publication Publication Date Title
Wei et al. Thermophysical properties and biodegradation behavior of green composites made from polyhydroxybutyrate and potato peel waste fermentation residue
CN112940471A (zh) 可降解塑料及其制备方法、一次性用品
Peelman et al. Heat resistance of new biobased polymeric materials, focusing on starch, cellulose, PLA, and PHA
JP5595216B2 (ja) 生分解性樹脂組成物
Finkenstadt et al. Poly (lactic acid) green composites using oilseed coproducts as fillers
WO2014032393A1 (fr) Matériau entièrement biodégradable et son procédé de fabrication
Brunel et al. Natural additives for poly (hydroxybutyrate-CO-hydroxyvalerate)-PHBV: effect on mechanical properties and biodegradation
JP2008513578A (ja) ポリヒドロキシアルカノエート用の核剤
CN107619584A (zh) 聚乳酸复合材料、餐具及其制备方法
US10882977B1 (en) Earth plant compostable biodegradable substrate and method of producing the same
US20170260338A1 (en) Shaped polylactide article and method of preparation
CN105038158A (zh) 一种食品级全降解耐高温型聚乳酸复合材料的制备方法
CN109354842A (zh) 一种聚乳酸复合材料及其制备方法
CN109824924A (zh) 一种可完全降解的包装膜及其制备方法
US20220034001A1 (en) Polymer blend compositions and degradable extruded netting made therefrom
Thomas A methodological outlook on bioplastics from renewable resources
CN114031914A (zh) 一种生物基吸塑材料及其制备方法
CN112029246B (zh) 一种含植物纤维的聚乳酸改性材料及其制备方法
WO2022260613A1 (fr) Procédé de production de polylactite présentant une aptitude au traitement efficace
CN113234305A (zh) 可降解复合材料及其制备方法与应用
Navia et al. Thermoplastic cassava flour
CN115449201A (zh) 一种聚乳酸秸秆复合材料的亮面改善方法及工艺
CN113637300A (zh) 一种全生物质聚乳酸竹纤维复合材料及其制备方法
CN111410827A (zh) 一种可降解医用薄膜材料及其制备方法
DE102010026532A1 (de) Gefüllte Formmassen

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21945314

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE