Polylactic acid is one of the most popular bioplastics used in recent years and it is often mixed with other polymers or chemicals to form polymer blend because polylactic acid is able to accelerate biodegradation of polymer blends. This paper presents some results of study on polymer blend based on polylactic acid (PLA) and ethylene-co-vinylacetate copolymer (EVA).
A complete and permanent hydrophilic modification of poly
(ethyleneterephthalate) (PET) films is achieved by argon-plasma irradiation,
subsequently grafting acrylic acid (AA) in vapor phase onto their surface. Both Ar
plasma irradiation alone and post grafting AA rendered a complete hydrophilicity to
PET surfaces. However, the hydrophilicity of the PET surface, only treated with the
Ar plasma, is not permanent. In contrast, PET films, irradiated by the Ar plasma,
exposed to air, and subsequently grafted with AA monomer, are permanently
Polyethylene-starch blend polymer has already found to be a potential candidate to replace non-degradable plastic in packaging . However, the degradation of that polymer in natural ambience (soil burial test) needs to be further evaluated. The purpose of this study is to investigate the degradability of PE-starch blend polymer in soil and in liquid medium. The soil is added starch degrading bacteria isolated from natural soil.
I got the opportunity to associate myself with Dr. Raj Pal Singh, senior scientist, Polymer
Chemistry Division, National Chemical Laboratory Pune, as my supervisor. As an
outstanding scientist and teacher he has given me the benefit of his guidance throughout
the course work. I am grateful to him for showing me all the angles of research life.
Thus, it remedies soil
degradation, desertification, and deforestation. Jatropha is native of tropical America, but
now flourish in many parts of the tropics and sub-tropics in Africa/Asia. Various parts of
the plant are of medicinal(both human and veterinary purposes) value for instance, and are
under intensive scientific investigation. The oil is a strong purgative, widely employed as an
antiseptic for cough, skin diseases, and a pain reliever from rheumatism. Jatropha latex can
heal wounds and also has antimicrobial properties (Openshaw, 2000).
In films that catered to Indian migrants, there was a clear emphasis on superiority of Indianness over western
culture. The Indian was shown to be pure whereas the western was the morally degraded. This duality was
established through the conduct of female characters like Kajol in Dilwali Dulhaniya Le Jayenge (DDLJ) –
1995, Pardes (1997) and Aa Ab Laut Chalen (1999). The western woman in these films was shown to be
morally degraded and inferior to the Indian woman, whom the hero eventually chose. The migrant Indians in
these films decided...
In a world where the population is expected
to rise to 10 billion by the turn of the century,
accelerating urbanisation and the increasing
the demand for food and energy; taking action
to secure sufficient water of acceptable quality
for humans and nature is as urgent as ever.
Climate change is projected to aggravate water
stress in many regions, especially where water
is already scarce and where the demand for
water is growing rapidly. Increased frequency
of floods is also projected.
The use of scientific techniques in materials conservation has notably
expanded in recent decades. There is much interest in identifying the
materials used in culturally important objects. Of great importance is
a clear understanding of the state and mechanisms of degradation of
objects susceptible to deterioration with time and exposure to environmental
factors. An understanding of the state of materials at a molecular
level can provide valuable information for conservators, enabling them
to decide on a conservation procedure....
Chương 6. Tương tác của bức xạ với vật liệu Polyme Trần Đại Nghiệp
Giáo trình xử lý bức xạ và cơ sở của công nghệ bức xạ NXB Đại học quốc gia Hà Nội 2007.
Từ khoá: Hiệu ứng khâu mạch, ngắt mạch, cross-linking, degradation, hiệu ứng tách khí, thay đổi tính chất của polyme do chiếu xạ. Tài liệu trong Thư viện điện tử