This document discusses green plastics as an alternative to petroleum-based plastics. It provides background on plastics and their environmental issues. Green plastics are made from renewable sources like plants, and are biodegradable. Examples include polylactic acid and polyhydroxybutyrate. Green plastics have advantages over conventional plastics like reduced greenhouse gas emissions, no use of petrochemicals, and biodegradability. The document discusses different types of green plastics and their production processes, as well as standards, costs, and ways to promote their use.

1. Green Plastics: An Emerging Alternative for
Petroleum Based Plastics
Presented By ANTU BHATTACHARJEE
• BARASAT GOVT.
COLLEGE
• WEST BENGAL STATE
UNIVERSITY
• MSC. 3rd SEM
• Reg no.-002559-2013 of
2013
• ROLL : BGC/ZOOL NO:
14105
• Year-2015

2. BACKGROUND
• ‘plastic’ is any organic
synthetic or processed
materials that are
mostly thermoplastic
or thermosetting
polymers of high
molecular mass.
• Littering or excessive
use, has harmed the
image of this useful
Product.

3. problems of conventional plastics

4. HISTORY OF GREEN PLASTICS
• In 1868 John W. Hyatt
invented Celluloid from
plant fibers (cellulose).
• After 1907,with the
invention of first
petroleum based
plastic sonly
conventional plastic
was steadily growing.
Fig: Henry Ford’s soy protein
plastic based composites

5. INTRODUCTION
• Green plastics can be made
from many different
sources like – (A)Plant Oil,
(F)Cellulose, (D)Corn,
(B)Starch,(C) Potato Starch,
(E)Sugarcane, Weeds etc.
• Examples: Polylactic acids
(PLA), Polyhydroxybutyrate
(PHB) etc.

6. PURPOSE OF GREEN PLASTICS
• Applications:Bottling,
resins, packaging, etc
• Advantages over
conventional plastics:
• 1.Reduces GHG in
production
• 2.Requires no
petrochemicals.
• 3.Biodegradable
• 4.Multiple end-of-life
options
• 5.Reduced carbon footprint

7. CHARACTERS OF GREEN PLASTICS
• Biodegradable and
compostable
• Renewability
• Environmentally
friendly nature
FIG: shows Bio-
Degradation of Green
Plastic.

8. THE DIFFERENCES AMONG
DEGRADABLE, BIODEGRADABLE,
AND COMPOSTABLE
• Degradable Plastic:
means that something
breaks down.
• Biodegradable Plastic: it
can be broken down by
the metabolism of micro-
organisms.
• Compostable Plastic:
means that it
biodegrades within a
certain amount of time,
under certain conditions.

9. • This Figure shows
typical data obtained
when the per cent
carbon released (as
CO2) from a green
plastic exposed in a
composting
environment is
plotted as a function
of time.

10. Green Plastics Classification
• Type I: Ex: polymers
derived from cellulose.
• Type II: Ex:PHA, PHBV.
• Type III: Ex : PLA

11. SYNTHESIS OF PLA

12. PRODUCTION OF PHB

13. CARBON CYCLE OF GREEN-PLASTICS

14. SOME FACTS ABOUT GREEN PLASTICS
• Processing Green Plastics Products
• Recycling Issues
• Synthetic Blending

15. Standards and Certifications for
COMPOSTABLE PLASTICS
• In the United States
ASTM D-6400
international (ISO-
14855).
• Certification from
other countries includes
EcoLogo (Canada) and
Vincotte (Belgium).

16. Cost Factor
• additional cost incurred
due to increased
processing steps.
• In India, the cost of
biodegradable plastics
is 2- 10 times more
than conventional
plastics.

17. DISCUSSIONS
• To promote green-
plastics:
• educating the society
• Standardizations and
certifications should be
publicized.
• Infrastructure for
collection and
composting needs to be
improved.
• Governmental
incentives.

18. CONCLUSION
• society’s current views
on environmental
responsibility make this
an ideal time for further
growth of green
plastics.
• If the trend continues
and the motivation for
innovation in this field
persists, the results
could be promising.

20. References
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of poly(lactide) films. Journal of Plastic Film & Sheeting, 19(2),123-135.
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Publishing Limited.
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20.
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Film & Sheeting, 22(3), 193-211.
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publish in The First International Conference on Green and Sustainable Technology conference
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21. References
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Plastics Technology, 56(8), 27-28.
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Polymer Reviews, 49(2), 65-78.
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Technology,(53)12, 39-43.
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Princeton, NY: Princeton University Press.
• Stevens, E.S. (2002). How green are green plastics?. BioCycle, 43(12), 42.
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22. ACKNOWLEDGEMENT
• I am highly indebted to Dr. Tuhin Saha,
Associate Professor of PG Department of
Zoology, Barasat Govt. College for giving this
review work and his guidance and
encouragement throughout this study.
• Sincere thanks to all our respected sirs and
madams of the PG Department of Zoology,
Barasat Govt. College for giving me the
opportunity to present this seminer.