TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The catalyst comprises an organolithium reagent (preferably n-butyl lithium or sec-butyl lithium); and further comprises 1,2-bis(dimethylamino)ethane. The hydrogenation reagent is hydrogen in presence of hydrogenation catalyst. The hydrogenation catalyst is 10% Pd/C.    TECHNOLOGY FOCUS - POLYMERS - Preferred Process: The polyfarnesene is partially hydrogenated or completely hydrogenated. The farnesene is copolymerized with vinyl monomer to form farnesene copolymer. The farnesene is prepared by microorganism; is derived from monosaccharide, disaccharide, and/or polysaccharide; and is derived from glucose, galactose, mannose, fructose, ribose, sucrose, lactose, maltose, trehalose, cellobiose, starch, glycogen, cellulose, and/or chitin. Preferred Components: The vinyl monomer is styrene. The polyfarnesene is block copolymer. The farnesene is alpha -farnesene and/or beta -farnesene. The polyfarnesene has formula -(X')n-(Y')m- (X). The (X) comprises one block of at least one X' and two blocks each of at least one Y' and where the one block of at least one X' is between the two blocks each of at least one Y'.n=1-100000;m=0-100000;X'=groups of formulae (I)-(VIII);Y'=group of formula (IX);R1=group of formula (XI);R2=group of formula (XII);R3=group of formula (XIII);R4=group of formula (XIV);R5-R8=H, alkyl, cycloalkyl, aryl, cycloalkenyl, alkynyl, heterocyclyl, alkoxy, aryloxy, carboxy, alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, acyloxy, nitrile or halo.The group (I) is at most 80 wt.% and (II) is 5-99 wt.%. Provided that:(1) when m is 1-100000, then mole percent ratio of X' to Y' is 1:4 to 100:1;(2) when m is 0, then polyfarnesene is farnesene homopolymer;(3) when m is 1-100000, then the polyfarnesene is random farnesene interpolymer or block farnesene interpolymer. EXAMPLE - To a dried three-neck reactor under argon atmosphere, a pre-dried solution comprising beta -farnesene (92.29 g) in cyclohexane (13.7%) was added. n-Butyl lithium (1.85x 10-3 mol) was added into the reactor as an initiator, and the reactor was heated at 50 degrees C for 19 hours, until all beta -farnesene was consumed, monitored by UV-Vis spectroscopy. Crude product was precipitated from the reaction mixture with a 1% solution of ethanol and tert-butyl catechol. After drying in a vacuum oven at 60 degrees C for 2 hours, product was kept under vacuum for 16 hours. Then 1,4-polyfarnesene was collected at (89.83 g, yield: 97%), was stored in a refrigerator to prevent any crosslinking before characterization. The obtained 1,4-polyfarnesene had number average molecular weight (Mn) of 104838 g/mol and weight average molecular weight (Mw) of 147463 g/mol.