Surface Modification of Low-Density Polyethylene Films via Photografting Polymerization Technique

2006 ◽  
Vol 11-12 ◽  
pp. 437-440 ◽  
Author(s):  
Wei Ning ◽  
Jian Ping Deng ◽  
Wan Tai Yang
Keyword(s):  
Surface Modification ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Xps Analysis ◽  
Step Method ◽  
Grafting Polymerization ◽  
Polyethylene Films ◽  
Ldpe Film ◽  
One Step

Surface modification of low-density polyethylene (LDPE) films was carried out via a novel photografting polymerization technique with acrylamide (AAm) as the monomer. The photografting polymerization can be achieved via one-step method and two-step method. The photografting polymerization reactivity of AAm was examined with benzophenone (BP) as the photoinitiator and low-density polyethylene (LDPE) film as the substrate with “sandwich” assembly. Moreover, the occurrence and evolution of grafting polymerization of AAm on the substrate was demonstrated XPS analysis and SEM pictures.

Surface modification of low density polyethylene films by homogeneous catalytic ozonation

2012 ◽  
Vol 90 (11) ◽  
pp. 1800-1806 ◽  
Author(s):  
Dipak Patel ◽  
Jiangning Wu ◽  
Philip Chan ◽  
Simant Upreti ◽  
Ginette Turcotte ◽  
...  
Keyword(s):  
Surface Modification ◽  
Catalytic Ozonation ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Polyethylene Films

scholarly journals Low-Density Polyethylene Films Carrying ferula asafoetida Extract for Active Food Packaging: Thermal, Mechanical, Optical, Barrier, and Antifungal Properties

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Razieh Niazmand ◽  
Bibi Marzieh Razavizadeh ◽  
Farzaneh Sabbagh
Keyword(s):  
Polymer Matrix ◽  
Food Packaging ◽  
Barrier Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Optical Barrier ◽  
Leaf Extracts ◽  
Polyethylene Films ◽  
Active Food Packaging ◽  
Ferula Asafoetida

The physical, thermal, mechanical, optical, microstructural, and barrier properties of low-density polyethylene films (LDPE) containing ferula asafoetida leaf and gum extracts were investigated. Results showed a reduction in elasticity and tensile strength with increasing extract concentration in the polymer matrix. The melting temperature and enthalpy increased with increasing concentration of extracts. The films containing extracts had lower L∗ and a∗ and higher b∗ indices. The films containing leaf extract had more barrier potential to UV than the gum extracts. The oxygen permeability in films containing 5% of leaf and gum extracts increased by 2.3 and 2.1 times, respectively. The morphology of the active films was similar to bubble swollen islands, which was more pronounced at higher concentrations of gum and leaf extracts. FTIR results confirmed some chemical interactions of ferula extracts with the polymer matrix. At the end of day 14th, the growth rate of Aspergillus niger and Saccharomyces cerevisea in the presence of the PE-Gum-5 reduced more than PE-Leaf-5 (3.7 and 2.4 logarithmic cycles, respectively) compared to the first day. Our findings showed that active LDPE films have desire thermo-mechanical and barrier properties for food packaging.

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