A Study of Specific Heat Capacity Functions of Polyvinyl Alcohol-Cassava Starch Blends

作者：Sin Lee Tin^*; Rahman W A W A; Rahmat A R; Morad N A; Salleh M S N

来源：International Journal of Thermophysics, 2010, 31(3): 525-534.

DOI：10.1007/s10765-010-0744-6

• Cassava starch
• Polyvinyl alcohol
• Specific heat capacity

The specific heat capacity (C (sp)) of polyvinyl alcohol (PVOH) blends with cassava starch (CSS) was studied by the differential scanning calorimetry method. Specimens of PVOH-CSS blends: PPV37 (70 mass% CSS) and PPV46 (60 mass% CSS) were prepared by a melt blending method with glycerol added as a plasticizer. The results showed that the specific heat capacity of PPV37 and PPV46 at temperatures from 330 K to 530 K increased from (2.963 to 14.995) J center dot g(-1) center dot K(-1) and (2.517 to 14.727) J center dot g(-1)center dot K(-1), respectively. The specific heat capacity of PVOH-CSS depends on the amount of starch. The specific heat capacity of the specimens can be approximated by polynomial equations with a curve fitting regression > 0.992. For instance, the specific heat capacity (in J center dot g(-1) center dot K(-1)) of PPV37 can be expressed by C (sp) = -17.824 + 0.063T and PPV46 by C (sp) = -18.047 + 0.061T, where T is the temperature (in K).

• 出版日期2010-3