Journal of Nanomaterials / 2010 / Article / Tab 2

Research Article

Preparation, Mechanical, and Thermal Properties of Biodegradable Polyesters/Poly(Lactic Acid) Blends

Table 2

Composition and thermal characteristics of the samples.

Sample P L A / P B A T a (wt%) 𝑇 𝑏 𝑔 ( ∘ C ) 𝑇 𝑏 𝑐 ( ∘ C ) 𝑇 𝑏 π‘š ( ∘ C ) Ξ” 𝐻 𝑏 𝑐 (Jg-1) Ξ” 𝐻 𝑏 π‘š ( J g βˆ’ 1 ) 𝑋 𝑐 𝑐 (%)


a W e i g h t ratio of the blends.
b T h e glass transition temperatures ( 𝑇 𝑔 ), the crystallization temperatures ( 𝑇 𝑐 ), the melting temperatures ( 𝑇 π‘š ), crystallization enthalpies ( Ξ” 𝐻 c ), melting enthalpies ( Ξ” 𝐻 π‘š ) were registered by DSC at a heating/cooling rate of 10  ∘ C /min.
c T h e degree of relative crystallinity ( 𝑋 𝑐 ) was calculated by dividing the observed Ξ” 𝐻 π‘š from the first heating trace by the theoretical value (81 J g βˆ’ 1 ) for a 100% crystalline PLA. 𝑋 𝑐 = Ξ” 𝐻 𝑐 / Ξ” 𝐻 βˆ— 𝑐 Ξ” 𝐻 βˆ— 𝑐 = 8 1 J β‹… g βˆ’ 1 .

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