The impact of interfaces in laminated packaging on transport of carboxylic acids

• The permeability of oleic and acetic acid through low density polyethylene (LDPE) and ethylene acrylic acid (EAA) have been measured using diffusion cells. In addition, the permeability through combinations of LDPE and EAA in the form of laminates with different numbers of layers has been determined. Oleic acid shows an almost 30 times higher permeability compared to acetic acid, which was partly explained by the adsorption of oleic acid to the film surface during the permeability experiment. In addition, the permeability is lower for both oleic and acetic acid in the laminates compared to the pure films. The decreased permeability can be explained by the presence of crystalline domains close to the interface. This is supported by SAXS data which suggests an ordering of polymer chains in the EAA film close to the interface. In summary, the results show that it is possible to create barrier materials with decreased permeability, which is interesting for example in the packaging industry.

Ämnesord

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

NATURVETENSKAP  -- Kemi -- Polymerkemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Polymer Chemistry (hsv//eng)

NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

Nyckelord

Interfaces

Laminates

Packaging

Permeability

Polymers

Acetic acid

Carboxylic acids

Ethylene

Mechanical permeability

Oleic acid

Organic acids

Packaging materials

pH

Polyethylenes

Acrylic acids

Barrier material

Crystalline domains

Diffusion cells

Laminated packaging

Low density polyethylene(LDPE)

Packaging industry

Polymer chains

Interfaces (materials)

acrylic acid derivative

carboxylic acid

ethylene acrylic acid

polyethylene

unclassified drug

adsorption

Article

diffusion

membrane permeability

membrane transport

packaging material

priority journal

surface property

Permeability

Laminates

Interfaces

Polymers

Packaging

barrier properties

molecular-weight

permeability

polyethylene

polypropylene

films

copolymers

vapors

issues

gases

Engineering

Polymer Science

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)