ผลของการเติมผลึกเหลวมวลโมเลกุลต่ำต่อการเป็นเนื้อเดียวกัน ของพอลิเมอร์ผสมซินดิโอแทกติกพอลิสไตรีน / พิเชษฐ์ พหุพงศ์ทรัพย์ = Effects of low molar mass liquid crystal addition on the miscibility of syndiotactic polystyrene blends / Pichet Pahupongsab
This research is concerned with studying the miscibility of syndiotactic polystyrene (SPS) blend with several polymers such as poly(alpha-methyl styrene) (PaMS), poly(ethyl methacrylate) (PEMA), poly(n-butyl methacrylate) (PBMA), poly(cyclohexyl acrylate) (PCHA), poly(cis-isoprene) (PIP) and poly(vinyl methyl ether) (PVME). SPS synthesized by using metallocene catalyst and modified-methylaluminoxane (MMAO) as cocatalyst. From the experimental results, it was found that the SPS can be miscible with PaMS, PEMA, PBMA, PCHA and PIP but it can not be miscible with PVME. Furthermore, the study concerned with the effect of addition cyclohexylbiphenylcyclohexane (CBC-33) and glycerol monostearate (GMS) on thermal properties and the crystallinity of blended polymer. The results showed that CBC-33 and GMS can also slightly decrease melting temperature (T[subscript m]) of the blends because they reduce melt viscosity of the blends, therefore the crystal of the blends will melt easier and form to crystalline slowly which correspond with depression of T[subscript c].