Compatibility of liquid deproteinized natural rubber having epoxy group (LEDPNR)/poly (L-lactide) blend

Reaction after mixing of liquid epoxidized natural rubber/poly(L-lactide) blend was performed to enhance the compatibility of the blend. The liquid epoxidized natural rubber was prepared by epoxidation of deproteinized natural rubber with peracetic acid in latex stage followed by depolymerization wi...

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Published inJournal of applied polymer science Vol. 108; no. 1; pp. 393 - 399
Main Authors Nghia, Phan Trung, Siripitakchai, Niti, Klinklai, Warunee, Saito, Takayuki, Yamamoto, Yoshimasa, Kawahara, Seiichi
Format Journal Article
LanguageEnglish
Published Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.04.2008
Wiley
Subjects
Applied sciences
blend
compatibility
epoxy group
Exact sciences and technology
Natural polymers
Natural rubber
NMR measurement
Physicochemistry of polymers
poly(L-lactide)
NMR measurement
Mixing
Polymer blends
Optically active polymer
Property composition relationship
blend
epoxy group
Liquid rubber
Natural rubber
Experimental study
Lactone polymer
Latex
Heterogeneous mixture
Lactic acid polymer
Chemical modification
poly(L-lactide)
Aliphatic polymer
Epoxidation
Miscibility
Epoxidized natural rubber
Interface reaction
Thermodynamic properties
compatibility
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Summary:Reaction after mixing of liquid epoxidized natural rubber/poly(L-lactide) blend was performed to enhance the compatibility of the blend. The liquid epoxidized natural rubber was prepared by epoxidation of deproteinized natural rubber with peracetic acid in latex stage followed by depolymerization with peroxide and propanal. The resulting liquid deproteinized natural rubber having epoxy group (LEDPNR) was mixed with poly(L-lactide) (PLLA) to investigate the compatibility of the blend through differential scanning calorimetry, optical light microscopy, and NMR spectroscopy. After heating the blend at 473 K for 20 min, glass transition temperature (Tg) of LEDPNR in LEDPNR/PLLA blend increased from 251 to 259 K, while Tg and melting temperature (Tm) of PLLA decreased from 337 to 332 K and 450 to 445 K, respectively, suggesting that the compatibility of LEDPNR/ PLLA blend was enhanced by a reaction between the epoxy group of LEDPNR and the ester group of PLLA. The reaction was proved by high-resolution solid-state ¹³C NMR spectroscopy. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Bibliography:http://dx.doi.org/10.1002/app.27095
ArticleID:APP27095
ark:/67375/WNG-9T8W8PJK-M
istex:9690272F347AB66C3AFDBDA314A4BB1F5F6D62D0
Ministry of Education, Culture, Sports and Technology, Japan
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0021-8995
1097-4628
DOI:10.1002/app.27095