Mingxia Yuan 1· Xin Li 1·
Yuan Xue 1,3, *· Hualin Lin 1, *·
Sheng Han 1,2,4, *
1 School of
Chemical and Environmental Engineering, Shanghai Institute of
Technology, Shanghai 201418, China
2 School of Chemistry and Chemical Engineering,
Shihezi University, Xinjiang, 832003, China
3 School of Materials Science and Engineering, the
University of Shanghai for Science and Technology, Shanghai, 200093,
China
4 School of Chemical and Environmental Engineering,
Sichuan University of Science & Engineering, Sichuan, 643002, China
* Corresponding author: Fax: +86-021-60873565, Tel: +86-02160873560;
Email address:
hansheng654321@sina.com (Sheng
Han) ,
sit_xueyuan@163.com
(Yuan Xue), lhl6534@163.com (Hualin Lin)
Abstract
The poor cold flow property is one of the main obstacle factors in
affecting the utilization of high-proportional biodiesel blends in
engines. In this study,
methcyclohexyl
methacrylate-methacrylate copolymers
(MCHMA-R1MC,
R1 = C12, C14,
C16, C18) were synthesized at various
molar ratios by radical polymerization and characterized by FTIR,
GPC, and 1H NMR.
Their structures and properties areanalyzed and characterized by FTIR,
GPC, and 1H NMR. The resulting copolymers were tested
as the cold flow improver in terms of cold filter plugging point (CFPP)
and solid point (SP) measurement for treated and untreated B20 biodiesel
blends (20 vol.% biodiesel + 80 vol.% diesel). Results showed that the
CFPP and SP of B20 decreased to a varied extent after
MCHMA-R1MC treatment. When the monomer ratio of is 1:7,
MCHMA-C14MC (1:7) proved the greatest depression in CFPP
and SP of B20 by 18 and 25℃ at 2000 ppm dosage. The effects of
MCHMA-R1MC copolymers on crystal behavior was studied
through polarizing optical microscope(POM), differential scanning
calorimetry(DSC) and viscosity-temperature curves. The results indicated
that MCHMA-C14MC could effectively delay the aggregation
of wax crystals and change their crystalline behavior by changing the
shape of the crystals and inhibiting the formation of large wax
crystals, and then lower the low-temperature viscosity of biodiesel
blends and make it exhibiting better cold flow properties.